Help! Bad texcoord index!!!?

Question

(Still happening in 3.5.5f3 - this is an unresolved issue )

Starting with unity3.5.3 ( I don't know the exact update, but the update before 3.5.4f1 ) We have a problem with "Bad texcoord index" errors and crashes

With Some clues from: http://forum.unity3d.com/threads/23924-more-than-four-textures-in-one-pass

removing some textures on our shader seem to fix the problem
turning off shadows fixes the problem
this problem is only directX - OpenGL on OSX is fine

This is very limiting, our shader needs Color Map Self Illum/Other special purposes Map NormalMap And Cubemap for reflections

Removing one of these maps seems to fix the problem, but would require changing our art.

Please Help

Thanks

Addendum : reported bug (Case 481853) Bad texcoord index errors and crashes still waiting to hear back

Answer 1

Answer by snakeylake · Aug 02, 2012 at 11:10 PM

Shaders attached. I've confirmed that the issue does NOT happen in 3.5.2f2.

The issue goes away if I disable vertex lighting. ( comment out #define VERTEX_COLOR_LIGHTING )

uber.shader.txt (1.5 kB)

common.cginc.txt (5.9 kB)

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ScroodgeM · Aug 03, 2012 at 06:45 AM 0

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shader compiles ok with both

#define VERTEX_COLOR_LIGHTING

and

//#define VERTEX_COLOR_LIGHTING

Unity version 3.5.4f1

how can i reproduce the error?

Answer 2

Answer by snakeylake · Aug 03, 2012 at 06:28 PM

Scroodge, Thanks for you interest! the error doesn't happen on shader compile here is an untextured project with the error ( open the test scene and make sure shadows are enabled an you should see an error - I couldn't upload textures on this post because it says there isn't enough space... the same error happens when it is textured )

The issue may be related to how the mesh was created... ( maybe the vertex colors in the mesh allow it to happen, stock unity sphere don't seem to cause the error )

test.zip (55.7 kB)

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Answer 3

Answer by ScroodgeM · Aug 04, 2012 at 10:52 AM

link: http://docs.unity3d.com/Documentation/Components/SL-SurfaceShaderExamples.html

citation: If you want to do reflections that are affected by normal maps, it needs to be slightly more involved: INTERNAL_DATA needs to be added to the Input structure, and WorldReflectionVector function used to compute per-pixel reflection vector after you've written the Normal output.

solution:

replace this:

texCUBE(_Cube, IN.worldRefl)

and all same calculations based on worldRefl with this:

texCUBE(_Cube, WorldReflectionVector (IN, o.Normal))

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Help! Bad texcoord index!!!?

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