| Author |
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wim verbeiren (wim)
| | Posted on Tuesday, April 24, 2001 - 11:09 am: | 
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I have asked this question a few months ago, but did not get the solution I was hoping for, although there were some good suggestions.
Now, with the new forum, I can show what I mean.
I try to achieve a 'smooth frosted glass' effect, the type you find in showers and some phone booths.
in the attached image, I have 3 versions: the first is done with a bumpmap of a 50%grey 5%noise image, the second one is done with 'mist' as bump, scaled to 2%, and the third one is done without bump, but blurred afterwards in photoshop.
the first 2 are no good, since they 'scatter' the image behind, rather than blurring it.
the latter is almost what I want to achieve, a smooth, half transparent, blurred picture, but it still is not realistic, since with real frosted glass, the further away the objects, the more blurred they are.
any suggestions?
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Panos Zervos (panosclip)
| | Posted on Wednesday, April 25, 2001 - 10:39 am: |
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I did some experiments with this feature. What I think is that the frosted glass is like caustics or refraction and should be "generic". We cannot reproduce or fake refraction when there is no support from the renderer.
One work around is to use the "fog" option to render. This is only a suggestion for scenes viewed through a window and works well when you are standing infront of your window.
Go to RenderZone options and select "fog" from the Depth Effect pulldown menu. Set the start of the fog behind the window. Set the amount and color and test render.
The fog gets thicker with distance and blurs the objects.
Hope this helps,
Panos |
Peder Lindbom (peder)
| | Posted on Thursday, April 26, 2001 - 03:45 pm: |
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Are you sure that you can«t get the effect you need with method number two?
While I haven«t used transparency like you describe I«ve used diffused reflections using bumpmaps. The problem you have is probably related to the scale of the bumpmap or the fact that your rendering isn«t highres. It seems surfaces look much rougher in lowres images.
Peder |
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