Can use a different color and translucency texture for each side of a flat object. It also implements the Stephen H. Westin velvet illuminance loop.
This example uses the following textures
Siblings: BMRTShaders AKShaders DPShaders DWShaders EMShaders FGShaders FSShaders IDShaders DWShaders KMShaders JBUMShaders JMShaders LGShaders LCShaders MBShaders MRShaders MKShaders PQShaders RCShaders SHWShaders SWShaders SIG91 SIG2000 SIG2001 TLShaders
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