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Sawed acrylic for scale models?

Posted: Sat Mar 21, 2009 11:41 pm
by Sheik
I’m making a architectural scale model rendering, and would like to have a material that looks like sawed acrylic. Something like what you see here:
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I didn’t find what I needed in the Mxm Gallery, but some ice materials came close. Every ice I checked out had a totally different approach to building the material. How would you approach this type of material? Do I need SSS for that glow & some translucency? Simply a roughness map on a dielectic without SSS(faster)? A bumpmap for the rough saw scrathes?
Any tips for making that sawed texture?

Posted: Sun Mar 22, 2009 12:35 am
by Mihai
It would probably work ok with just glass and roughness textures mapped for the sides, perhaps another roughness for the top/bottom. If just glass isn't enough you can always blend it with an SSS component. Or just SSS, it can clear pretty fast if the settings make it look almost like glass with just a bit of scattering.

For the saw scratches you can try in PS to first fill a layer with white or black, Filter>Add noise. Then Filter>Blur>Radial Blur, and set it pretty high so you get circular grooves. Then crop a part of it:

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Posted: Sun Mar 22, 2009 7:24 pm
by Sheik
Thanks Mihai,
Here is a first pass at it.
From the right; low grade glass with bump and roughness map, the same with a JadeGlass SSS layer, AGS with a tint layer using the same maps.
SSS doesn’t add much imo, so I will keep improving the glass one. Not quite there yet. It looks too much like what it; glass with a scratch.
I made the scratch map using PixPlant, so I would get a tillable texture. I used the normal map for scratches, but I am wondering if the traditional bump would work better for scratches here… I am not sure it looks like acrylic that has a rough sawed surface?
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