Here's one I did recently to test out some refraction settings. I made the glasses in 3DS Max and imported them into sketchup. I wanted to get the chrome spheres to be reflective within the glass. I found this to be impossible without removing the refraction layer. However when doing this, I found that my glass then appeared to be two separate panes, inside and out. This was really obvious with the glass that is laying down. So, I ended up making two separate glass materials and applied one without refraction to the upright glasses with the marbles in them, and one with refraction (affect shadows checked) to the glass laying on it's side. This was the only way I could get the light to pass through enough to allow the chrome to be reflective.
Check it out
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Here's one without refraction on all of the glasses.....before any post processing....notice the glass on it's side.
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Here's the sketchup setup scene
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Check it out
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Here's one without refraction on all of the glasses.....before any post processing....notice the glass on it's side.
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Here's the sketchup setup scene
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