Can't Alter Offset/repeat Of Texture Used As Alphamap
demo:  https://dl.dropboxusercontent.com/u/123374/so-pages/20160601/index.html the alphaTexture is having it's offset altered during each render. as a 'map' property it changes, bu
Solution 1:
What you are seeing is a current "feature" of three.js: only one offset/repeat pair is allowed per mesh. mesh.map has priority.
For more info, see https://stackoverflow.com/a/14372235/1461008
This may be changed in the future to allow separate offset/repeat settings per texture or per material property.
three.js r.84
Solution 2:
I tried commenting out the USE_ALPHAMAP with the latest version(82) but it didn't work. However, changing the vUv to vUv2 in the alpha_fragment chunk worked.
Jim
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