[osg-users] Check if sampler2D is valid in fragment shader

Christian Buchner christian.buchner at gmail.com
Thu Dec 29 02:32:58 PST 2016

> I will receive the final scene with or without textures

You could traverse the scene graph and check the state sets to see if they
bind a texture to a texture unit.
Then depending on these findings, choose the correct shader code.

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