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glass cases & image props

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I am modeling a museum gallery with a lot of glass cases and I am having two problems. One is that when I make an image prop of an artifact (that looks good and renders fine) and put it into a glass case & render, the masking doesn't seem to work, and the object's solid box shows.

The other problem I'm having is that when I render the scene, the areas that glass seen through glass (because of all the cases) appear to be solid (light blue). I have the transparency set really high for my glass and a low refraction.

Any suggestions?

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Hello Tasfire:

Try using Custom RW mode with the raytracing recursion level set to twice the number of overlapping transparent surfaces. So for an image prop in a glass case you might try 8 or more. Final Quality RW uses a value of 5.

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Hello again Tasfire:

You could eliminate the refraction calculations by using a combination of Mirror and Plain transparency shaders.

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