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Blender Internal: UV Mapping inside node groups does not work
Closed, ResolvedPublic

Description

System Information
Windows 7 64 bit
Nvidia GTX 750Ti

Blender Version
Broken: (2.75.4 946b850)

Short description of error
In Blender Internal material nodes:
If you use the UV output of the Input>Geometry inside a node group without using it outside, the UV coordinates won't be correct.

Exact steps for others to reproduce the error
In the node editor, you can see a node group ("TestTexture") connected to the material output. The node group contains a UV input, connected to a texture node.
The other two nodes are unused.
If you press render, you should see a textured cube, but you don't, because of the bug.

But if you re-render with the UV output connected to the input of the RGB to BW-node (or any other input), it will render correctly. Even though these two nodes aren't connected to the output at all.