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I've been working with some materials trying to acheive a level of translucency -- ideally the material is a thin milky polypropylene which when looked through shows objects behind it as diffuse. I can't quite get the sss working correctly...my preview window shows a lot of white dots around my current material and it seems to take forever to clean up. Objects near the material that are reflecting also have the white dots...

Am I missing something?

Thanks

jvm

Don't trust preview for SSS; it doesn't support it, I think.

SSS scatters light inside the volume, roughness scatters it at surface. As you say it will be a thin object a good alternative for sss would be rising roughness.

Fernando-

Okay...preview isn't the result but it's an indicator of where it's heading...right now with sss enabled in my material it is not cleaning up and for a lack of a better word...overexposed. Way too much "white" in it.

I really need to post an image.

jvm

Here's an image...apologies for the blurryness around the material...

jvm

Could you show how is that material made?

Fernando-

Thanks for your reply...it was a standard material download -- milky-white-plastic from mxm board.

Anyway...I took your advice re: roughness setting for material, played around, eliminated sss, and came up with something pretty close to translucent polypropylene...will post mxm shortly.

jvm

Hi Juan,

That coating in your material...

If you want to try the sss way again I would start with this material by Tom: http://mxmgallery.maxwellrender.com/sea ... earch=milk which I think is pretty nicely structured.
You'll probably need something more transparent so you'll need to make transmittance in first layer quite much lighter; also, if you don't want that specularity on surface you should rise roughness on second layer (which handles this part) to something like 20. Only with that may fit your needs, I guess.

Remember that for previewing sss you need to set it to RS1 (right click on preview window).
Also I made some time ago a preview scene for sss and attenuation which may help a bit: http://www.maxwellrender.com/forum/view ... view+scene
Just have to put them in the same folder as the other preview scenes.

there's a "sss without sss" mxm on Mxm Gallery, you should take a look at it
Thanks Fernando for your SSS preview, we missed that!

Def4d-

Thanks for pointing out "sss without sss" will have to look at that.

jvm

Put a small emitter inside your translacent non-SSS material/object. That can make it look like SSS.