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I have modeled a marble countertop here:
Upon rendering it however, there is a red lighting along the edges:
I am using the Cycles render engine. What settings do I need to enable/disable to avoid this red lighting from occurring?
I have attached the blender file below if you'd like to investigate:
You've given Subsurface Scaterring to your marble material, you need to either lower it down to 0 or, in the Subsurface Radius, lower down the first value, it is the red color value that is scattered in the volume, the 2 other values are green and blue:
