Im my scene, a point light is right above a table, and the light is textured to mimic a projector. Projector However, the projection is slightly distorted. Is there a way to solve this problem? Node tree The script node is only for changing the colour of the texture, it does not affect how the texture is mapped.

  • $\begingroup$ For the light position play with the mapping "location" values. For the fireflies, check here: www.blenderguru.com/articles/7-ways-get-rid-fireflies/ $\endgroup$
    – LDCO
    Commented Sep 9, 2016 at 4:14
  • $\begingroup$ As I see now, I don't think I have understood right the issue - the problem is the light position or the texture mapping of the square mesh? $\endgroup$
    – LDCO
    Commented Sep 9, 2016 at 14:05

1 Answer 1


Wanted to add an answer here since this comes up first in google:

Between your Texture Coordinate node and your Mapping node, you should divide the X and Y parts of the normal vector by the Z part, and set the Z part to 1.

enter image description here

This was apparently reported as a bug in 2010, deemed expected behavior, and never fixed:


so thanks to the original reporter for the analysis and the solution.


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