View Full Version : wet glass

05 May 2007, 11:52 AM
In my current project, the most complex I've attempted to date, I have a wall of windows, and while most of the glass is covered by curtains, some does show clearly. You can't see the background image I'm using terribly clearly, but you can see it and it looks like a rainy day image. I want this to be rainy outside. For the glass I'm using the default Max glass with diffraction set at 1.1. It makes no real difference to the look of the glass to have it set that low and it saves on render time (which at last test was running about 6 hours).

My problem is, how do I make it appear there are drops and rain streaks on the outside of the glass. My first idea was to make an opacity map with the drops and streaks on it, but I need the elements to have specularity, and I'm not sure am opacity mao could do that. I could, displace the opacity plane, but that doesn't strike me as a good idea as my scene already contains 1546 objects with 3,660,816 faces, so adding several poly heavy planes would likely over stress my crappy computer which is already breathing heavily and moaning about the scene.

So, any ideas or tips anyone could share with me about how to do this? I know glass is a common problem in texturing, but surely someone done wet glass before. I'd appreciate a little help if anyone has any ideas. I'm trying to take this scene to a level of detail I've never done before, and this is about my last addition to it before the final render.

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05 May 2007, 11:52 AM
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