Found something at blenderguru.com under the Ray Depth section. So I compared 3 glass figures, each with their own balls placed in the backdrop pink square. Fig 1 is the blenderguru glass, fig 2 is the parkdalegardener glass listed earlier in this thread, and fig 3 is the adp001 glass listed earlier in this thread. I rendered Superfly at Low Adaptive GPU. Skydome light has hdri mountain image and light is Poser's Superfly Loop. For the balls, I turned off Cast Shadows.

Here's the blenderguru setup.

So then I tested it on thin boxes (to the right of the mannequin). Box at top is 1% z scale and box below is 5% z scale. Cast shadows of boxes is off.

I'm no artist, so I'm not a good judge, but I kinda like the blenderguru glass using ray depth. (I forgot to test against 3D Mobster's glass!)

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Old lady hobbyist. All visual art or fiction is "playing with dolls."

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