grouping texture nodes can change the range of values coming from the coordinates input #45696
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Reference: blender/blender#45696
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System Information
Linux bubastis 3.18.12-gentoo #1 SMP Tue Jun 16 16:26:19 EDT 2015 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M] (rev a1)
Blender Version
Broken: 2.74
A set of texture nodes that include a connection from the Input > Coordinate into a Separate RGBA node provides values that copy the UV coordinates (usually 0..1). If that Separate RGBA node is wrapped in a group, the range of values coming out of the Coordinate changes to -1..1.
Changing it so that the group input is a blue dot instead of a yellow dot works around the problem.
Screenshots and a sample .blend file are at http://blender.stackexchange.com/questions/34894/grouping-texture-nodes-changes-the-coordinate-space?noredirect=1#comment56186_34894
The behavior of the nodes should not change just because they are wrapped in a group. It should remain consistent in all contexts.
Changed status to: 'Open'
Added subscriber: @mutantbob
Added subscriber: @gandalf3
Added subscriber: @Blendify
texture-node-insanity.blend posting .blend here for ease
Added subscribers: @Sergey, @JulianEisel
Indeed, something weird going on here. Could you have a look @Sergey?
Changed status from 'Open' to: 'Archived'
Texture nodes is the most obscure and fragile area of Blender, which currently doesn't have maintainer. I've started looking into re-designing this system some time ago, but project wasn't quite finished still.
I would move the report to the TODO (http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Node_Textures) for until we'll find someone to pick up development in that area.
So thanks for the report, but archiving as a TODO.