Can I create an upright 7-foot × 5-foot wall with the Minor Illusion spell?












28












$begingroup$


The Minor Illusion spell description states:




If you create an image of an object—such as a chair, muddy footprints, or a small chest—it must be no larger than a 5-foot cube. The image can’t create sound, light, smell, or any other sensory effect. Physical interaction with the image reveals it to be an illusion, because things can pass through it.




(emphasis mine). My question is how to interpret this cube. If we rotate the cube vertically so that it looks like a diamond from the side (the cube in red in the drawing), i.e. the diagonal of the cube is vertical, then a 7ft by 5ft wall would certainly fit, since the diagonal (the blue line) is about 7ft long:



Red is a 5ft cube, blue is a wall 7ft tall, 5ft wide (the width doesn't really matter here)



Much better drawing thanks to @Sdjz:



Actually reasonable visualisation



Is this "layout" of a cube valid for the Minor Illusion spell?



Note that this could potentially change the argument of the answer to "Can I use Minor Illusion to create a wall, hide behind it, and attack with advantage?".



Also related: How does orienting a cube-shaped spell work in three-dimensional space?










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    $begingroup$
    For the record I like the original drawing way better. (no offense to sdjz)
    $endgroup$
    – lightcat
    8 hours ago
















28












$begingroup$


The Minor Illusion spell description states:




If you create an image of an object—such as a chair, muddy footprints, or a small chest—it must be no larger than a 5-foot cube. The image can’t create sound, light, smell, or any other sensory effect. Physical interaction with the image reveals it to be an illusion, because things can pass through it.




(emphasis mine). My question is how to interpret this cube. If we rotate the cube vertically so that it looks like a diamond from the side (the cube in red in the drawing), i.e. the diagonal of the cube is vertical, then a 7ft by 5ft wall would certainly fit, since the diagonal (the blue line) is about 7ft long:



Red is a 5ft cube, blue is a wall 7ft tall, 5ft wide (the width doesn't really matter here)



Much better drawing thanks to @Sdjz:



Actually reasonable visualisation



Is this "layout" of a cube valid for the Minor Illusion spell?



Note that this could potentially change the argument of the answer to "Can I use Minor Illusion to create a wall, hide behind it, and attack with advantage?".



Also related: How does orienting a cube-shaped spell work in three-dimensional space?










share|improve this question









New contributor




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    Welcome to RPG.SE! Take the tour if you haven't already, and check out the help center for more guidance.
    $endgroup$
    – V2Blast
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  • 2




    $begingroup$
    For the record I like the original drawing way better. (no offense to sdjz)
    $endgroup$
    – lightcat
    8 hours ago














28












28








28





$begingroup$


The Minor Illusion spell description states:




If you create an image of an object—such as a chair, muddy footprints, or a small chest—it must be no larger than a 5-foot cube. The image can’t create sound, light, smell, or any other sensory effect. Physical interaction with the image reveals it to be an illusion, because things can pass through it.




(emphasis mine). My question is how to interpret this cube. If we rotate the cube vertically so that it looks like a diamond from the side (the cube in red in the drawing), i.e. the diagonal of the cube is vertical, then a 7ft by 5ft wall would certainly fit, since the diagonal (the blue line) is about 7ft long:



Red is a 5ft cube, blue is a wall 7ft tall, 5ft wide (the width doesn't really matter here)



Much better drawing thanks to @Sdjz:



Actually reasonable visualisation



Is this "layout" of a cube valid for the Minor Illusion spell?



Note that this could potentially change the argument of the answer to "Can I use Minor Illusion to create a wall, hide behind it, and attack with advantage?".



Also related: How does orienting a cube-shaped spell work in three-dimensional space?










share|improve this question









New contributor




Sebas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




The Minor Illusion spell description states:




If you create an image of an object—such as a chair, muddy footprints, or a small chest—it must be no larger than a 5-foot cube. The image can’t create sound, light, smell, or any other sensory effect. Physical interaction with the image reveals it to be an illusion, because things can pass through it.




(emphasis mine). My question is how to interpret this cube. If we rotate the cube vertically so that it looks like a diamond from the side (the cube in red in the drawing), i.e. the diagonal of the cube is vertical, then a 7ft by 5ft wall would certainly fit, since the diagonal (the blue line) is about 7ft long:



Red is a 5ft cube, blue is a wall 7ft tall, 5ft wide (the width doesn't really matter here)



Much better drawing thanks to @Sdjz:



Actually reasonable visualisation



Is this "layout" of a cube valid for the Minor Illusion spell?



Note that this could potentially change the argument of the answer to "Can I use Minor Illusion to create a wall, hide behind it, and attack with advantage?".



Also related: How does orienting a cube-shaped spell work in three-dimensional space?







dnd-5e spells area-of-effect






share|improve this question









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edited 21 hours ago









V2Blast

25.6k488158




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asked yesterday









SebasSebas

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  • $begingroup$
    Welcome to RPG.SE! Take the tour if you haven't already, and check out the help center for more guidance.
    $endgroup$
    – V2Blast
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  • 2




    $begingroup$
    For the record I like the original drawing way better. (no offense to sdjz)
    $endgroup$
    – lightcat
    8 hours ago


















  • $begingroup$
    Welcome to RPG.SE! Take the tour if you haven't already, and check out the help center for more guidance.
    $endgroup$
    – V2Blast
    21 hours ago






  • 2




    $begingroup$
    For the record I like the original drawing way better. (no offense to sdjz)
    $endgroup$
    – lightcat
    8 hours ago
















$begingroup$
Welcome to RPG.SE! Take the tour if you haven't already, and check out the help center for more guidance.
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– V2Blast
21 hours ago




$begingroup$
Welcome to RPG.SE! Take the tour if you haven't already, and check out the help center for more guidance.
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– V2Blast
21 hours ago




2




2




$begingroup$
For the record I like the original drawing way better. (no offense to sdjz)
$endgroup$
– lightcat
8 hours ago




$begingroup$
For the record I like the original drawing way better. (no offense to sdjz)
$endgroup$
– lightcat
8 hours ago










2 Answers
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26












$begingroup$

Yes, though a DM might not want to deal with abnormal spell positioning



In the Sage Advice compendium, a similar question was asked about the spell Cloud of Daggers:




Using 5-foot squares, does cloud of daggers affect a single square? Cloud of daggers (5 ft. cube) can affect more than one square on a grid, unless the DM says effects snap to the grid. There are many ways to position that cube.




While the Sage Advice article deals with a different spell, the matter is directly related to your question. To wit: "non-snapped" positioning of a spell's area of effect is legal, strictly speaking, though it might not fly with a DM who can house-rule otherwise.






share|improve this answer











$endgroup$





















    3












    $begingroup$

    The answer is technically yes.



    Due to the wording of the spell, if the object (illusion) that you want to create fits within the 5 ft cube, you can use the spell to create it. However, like all interpretations of the rules in D&D, the DM makes the final decision. Especially in this scenario, the DM might decide that the theoretical cube (the size requirement) must be placed flat on the ground or something like that. What I'm trying to say, is that even if the DM allows it, they might not let it work the way that you want.



    Good question. I really love that you are using your math to find loopholes in the rules; I'll have to remember to do that myself in the future. Hope this helped!






    share|improve this answer










    New contributor




    Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






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    • $begingroup$
      Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
      $endgroup$
      – Neil Slater
      12 hours ago










    • $begingroup$
      Yeah, I can see that.
      $endgroup$
      – Smart_TJ
      10 hours ago











    Your Answer





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    2 Answers
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    2 Answers
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    active

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    26












    $begingroup$

    Yes, though a DM might not want to deal with abnormal spell positioning



    In the Sage Advice compendium, a similar question was asked about the spell Cloud of Daggers:




    Using 5-foot squares, does cloud of daggers affect a single square? Cloud of daggers (5 ft. cube) can affect more than one square on a grid, unless the DM says effects snap to the grid. There are many ways to position that cube.




    While the Sage Advice article deals with a different spell, the matter is directly related to your question. To wit: "non-snapped" positioning of a spell's area of effect is legal, strictly speaking, though it might not fly with a DM who can house-rule otherwise.






    share|improve this answer











    $endgroup$


















      26












      $begingroup$

      Yes, though a DM might not want to deal with abnormal spell positioning



      In the Sage Advice compendium, a similar question was asked about the spell Cloud of Daggers:




      Using 5-foot squares, does cloud of daggers affect a single square? Cloud of daggers (5 ft. cube) can affect more than one square on a grid, unless the DM says effects snap to the grid. There are many ways to position that cube.




      While the Sage Advice article deals with a different spell, the matter is directly related to your question. To wit: "non-snapped" positioning of a spell's area of effect is legal, strictly speaking, though it might not fly with a DM who can house-rule otherwise.






      share|improve this answer











      $endgroup$
















        26












        26








        26





        $begingroup$

        Yes, though a DM might not want to deal with abnormal spell positioning



        In the Sage Advice compendium, a similar question was asked about the spell Cloud of Daggers:




        Using 5-foot squares, does cloud of daggers affect a single square? Cloud of daggers (5 ft. cube) can affect more than one square on a grid, unless the DM says effects snap to the grid. There are many ways to position that cube.




        While the Sage Advice article deals with a different spell, the matter is directly related to your question. To wit: "non-snapped" positioning of a spell's area of effect is legal, strictly speaking, though it might not fly with a DM who can house-rule otherwise.






        share|improve this answer











        $endgroup$



        Yes, though a DM might not want to deal with abnormal spell positioning



        In the Sage Advice compendium, a similar question was asked about the spell Cloud of Daggers:




        Using 5-foot squares, does cloud of daggers affect a single square? Cloud of daggers (5 ft. cube) can affect more than one square on a grid, unless the DM says effects snap to the grid. There are many ways to position that cube.




        While the Sage Advice article deals with a different spell, the matter is directly related to your question. To wit: "non-snapped" positioning of a spell's area of effect is legal, strictly speaking, though it might not fly with a DM who can house-rule otherwise.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited yesterday

























        answered yesterday









        RykaraRykara

        4,6321040




        4,6321040

























            3












            $begingroup$

            The answer is technically yes.



            Due to the wording of the spell, if the object (illusion) that you want to create fits within the 5 ft cube, you can use the spell to create it. However, like all interpretations of the rules in D&D, the DM makes the final decision. Especially in this scenario, the DM might decide that the theoretical cube (the size requirement) must be placed flat on the ground or something like that. What I'm trying to say, is that even if the DM allows it, they might not let it work the way that you want.



            Good question. I really love that you are using your math to find loopholes in the rules; I'll have to remember to do that myself in the future. Hope this helped!






            share|improve this answer










            New contributor




            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$













            • $begingroup$
              Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
              $endgroup$
              – Neil Slater
              12 hours ago










            • $begingroup$
              Yeah, I can see that.
              $endgroup$
              – Smart_TJ
              10 hours ago
















            3












            $begingroup$

            The answer is technically yes.



            Due to the wording of the spell, if the object (illusion) that you want to create fits within the 5 ft cube, you can use the spell to create it. However, like all interpretations of the rules in D&D, the DM makes the final decision. Especially in this scenario, the DM might decide that the theoretical cube (the size requirement) must be placed flat on the ground or something like that. What I'm trying to say, is that even if the DM allows it, they might not let it work the way that you want.



            Good question. I really love that you are using your math to find loopholes in the rules; I'll have to remember to do that myself in the future. Hope this helped!






            share|improve this answer










            New contributor




            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$













            • $begingroup$
              Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
              $endgroup$
              – Neil Slater
              12 hours ago










            • $begingroup$
              Yeah, I can see that.
              $endgroup$
              – Smart_TJ
              10 hours ago














            3












            3








            3





            $begingroup$

            The answer is technically yes.



            Due to the wording of the spell, if the object (illusion) that you want to create fits within the 5 ft cube, you can use the spell to create it. However, like all interpretations of the rules in D&D, the DM makes the final decision. Especially in this scenario, the DM might decide that the theoretical cube (the size requirement) must be placed flat on the ground or something like that. What I'm trying to say, is that even if the DM allows it, they might not let it work the way that you want.



            Good question. I really love that you are using your math to find loopholes in the rules; I'll have to remember to do that myself in the future. Hope this helped!






            share|improve this answer










            New contributor




            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$



            The answer is technically yes.



            Due to the wording of the spell, if the object (illusion) that you want to create fits within the 5 ft cube, you can use the spell to create it. However, like all interpretations of the rules in D&D, the DM makes the final decision. Especially in this scenario, the DM might decide that the theoretical cube (the size requirement) must be placed flat on the ground or something like that. What I'm trying to say, is that even if the DM allows it, they might not let it work the way that you want.



            Good question. I really love that you are using your math to find loopholes in the rules; I'll have to remember to do that myself in the future. Hope this helped!







            share|improve this answer










            New contributor




            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.









            share|improve this answer



            share|improve this answer








            edited 21 hours ago









            V2Blast

            25.6k488158




            25.6k488158






            New contributor




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            answered 23 hours ago









            Smart_TJSmart_TJ

            12711




            12711




            New contributor




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            New contributor





            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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            Smart_TJ is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.












            • $begingroup$
              Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
              $endgroup$
              – Neil Slater
              12 hours ago










            • $begingroup$
              Yeah, I can see that.
              $endgroup$
              – Smart_TJ
              10 hours ago


















            • $begingroup$
              Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
              $endgroup$
              – Neil Slater
              12 hours ago










            • $begingroup$
              Yeah, I can see that.
              $endgroup$
              – Smart_TJ
              10 hours ago
















            $begingroup$
            Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
            $endgroup$
            – Neil Slater
            12 hours ago




            $begingroup$
            Worth a caveat about the math: The main problem with doing math in D&D for these kinds of things is that at least one person (the DM) has to think about, understand and approve your math. Other players might have to at least understand it to know what is going on in the game. Eventually the group as a whole can end up doing quite a lot of math to explain 6 seconds in the game world, and less of the rest of D&D as a result, all to get some marginal benefit out of a low-level effect. This could be fun if enough of you like geometry and trigonometry problems, but it is somewhat niche.
            $endgroup$
            – Neil Slater
            12 hours ago












            $begingroup$
            Yeah, I can see that.
            $endgroup$
            – Smart_TJ
            10 hours ago




            $begingroup$
            Yeah, I can see that.
            $endgroup$
            – Smart_TJ
            10 hours ago










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