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In the linked blend file I have a box with a volume shader with a texture cut out coming from an image file.

https://drive.google.com/file/d/1LpxQXZRF66g3nVZw7lU8kgAVEVJY9Ant/view?usp=sharing

There are two examples in the shader network of the cube geo. One that work with the texture mapped through object space and another where the texture goes through a camera projection UVs. The later doesn't work.

How can I get the volume texture to work with the projection UVs?

Thanks!

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So apparently Volumes shader don't support UV coordinates. So I generated the projection vector using this method:

Camera projection without generating UV's?

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  • $\begingroup$ It's not that surprising, UVs are a 2D representation of a 3D surface. Volume is, by definition, a volume, not a surface. UVs would have "nothing" to define a volume, only the surface that encloses it. $\endgroup$
    – Lauloque
    Commented Aug 30, 2022 at 16:17

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