Here's a glass bottle with a big chip taken out of it. The image on the left was created using the techniques described in my Shiny Refractive Glass tip. It's nice, but there's still something not quite right about it. The glass is uniformly transparent no matter how thick the glass is at a given point.
The image on the right is of the same object, with my Glass Thickener shader applied to its surface. Ooh, ahh. Notice how much more detail there is in the refractions, and how the shadows are rendered properly as two shadows, not four. (Although still no caustics. Sorry!)
Version 2 adds true thickness-attenuated color filtering! The color filtering is now based on a physically accurate model and you can simulate semi-opaque materials such as apple cider.
To see how to use it, read my GThick tutorial.
Currently, GThick2 is freeware. Not public domain, but free of charge. Just give credit where credit is due, and let me know if you're using it it. Thanks!
Click here to download gthick2.lsc (zipped)
NEW: Click here for a preview of GThick version 3.0.
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