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Render Issue: Material: Glass vs Clear Plastic

Question asked by Mitchel Palme on Jul 12, 2011
Latest reply on Sep 12, 2014 by Chris Daniel

i am testing clear materials.


i have just noted that a "glass" material on an object took 57secs to render (800x600px) vs 37minutes for the same part in "clear plastic".

i would have imagined that the "clear plastic" has no or limited refractions and would have rendered even faster than the glass.


anyone else find this? any explanation?


i am also using keyshot. it has a material called "window" which uses limited refractions similar to a clear plastic.

as a side note, Keyshot to render the same scene, was about the same render time for the "glass" material in Photoview, maybe a little quicker but not much.