koobas.hobune.stream
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TEXCOORD 0 1 2 3 for cg shader scripting?
I was wondering what the differences were between TEXCOORD0 TEXCOORD1 TEXCOORD2 and TEXCOORD3 in cg shader scripting. What exactly is each one used for and when do you use it? Thanks in advance
TEXCOORD0 is the first texture coordinate channel, TEXCOORD1 is the second and so on. Unity currently only supports 2 channels(I think 5.0 may support more).
I think the amount of supported TEXCOORDs depends on the shader level you are building for.
$$anonymous$$r Telford in the Noob to Pro shader tutorials uses 4 in a dx9 shader.
I originally thought the channels were fixed in function but I notice he interchanges them occasionally without breaking anything.
That's strange there seems to be a consensus that 2 is the limit. I know in a unity mesh you can only get to 2 in code. 4 is mentioned for 5 here http://forum.unity3d.com/threads/bindchannels-maximum-two-uv-sets.177669/
