Why use Refraction on Arch Glass?
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Why use a refraction layer on arch glass? Does anyone do it and why? Do we think the result is more realistic?
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I don't and never felt the need to...
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Depends on what I'm modeling. On more detailed models, I always model glass with thickness and refraction. But for exterior models, I only do a single plane and no refraction. For small scale stuff, like a display case, I always model true to life. As long as you have 100% transparency in your glass, you should be fine in terms of render times with refraction. I only see a slowdown if I forget and don't have full transparency for my glass.
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You don't need refraction on a double glazed window, do you ?
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@jiminy-billy-bob said:
You don't need refraction on a double glazed window, do you ?
Nope. It just slows down render time. Refraction is only really apparent on thick glass or ornamental glass.
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I model the thickness usually for the reflections. You're right that on architectural, refraction is not really needed. But as far as I can tell, as long as the settings are correct, there really is no speed detriment, and it allows one to use fog color in the glass.
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I forgot to mention I have a dual core. If I add anything refractive it slows down render time....but I'm not using vray anyway, so my render time comment is wholly irrelevant.
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