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Re:Three.js editor by deltakosh on Monday January 02, 2017 @09:05PM (#13306100)
Just pushed an update to remove the string concat. No evidence of broken cache as all references to activeTextureCache use texture channel index.
Re:Three.js editor by jeremiep on Tuesday January 03, 2017 @09:19AM (#13309256)
You won't see it in the code. Run it through the debugger; the value of "channel" is sometimes the value of the GL enum rather than the index of the texture unit.

It could've been fixed since as well.