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Glass and Denim
Posted: Wed Jul 11, 2018 10:49 pm
by FarbigeWelt
This is just playing around with Glass and Volume settings. There is an especially fancy material there: Denim. For my taste default settings are a bit out of line. However it is fun to use. In my opinion more useful is a nice wood material and a brick material with offset for 3d look and free shapeable tiles. Who coded Denim material could also be able to add some further goodies.
- Glass Material with Volume and a Denim Cube
Trying Velvet
Posted: Thu Jul 12, 2018 10:49 pm
by FarbigeWelt
Velvet with its advanced three parameters is a bit beyond my current understandig of what is happening.
EDIT: Picture replaced after 6 h rendering, CPU BiDir (i7 4770K, 3.5 GHz), comment added.
- Velvet with Volume, 6h
Well it is not a pure velvet material, it is a mix with a null, the material has its own internal volume.
https://wiki.luxcorerender.org/LuxCoreR ... als_Velvet
"p1, p2, p3
These are three polynomials that define the appearance of the fuzz. They are rather abstract, so its best to just play around until you get a good result. "
Seems to be exactly like in the description. Playing with velvet, opacity and volume delivers nice and sometimes surprising results. The test shape in my picture is all made from the same material.
Trying Velvet 2
Posted: Fri Jul 13, 2018 7:27 pm
by FarbigeWelt
Re: Test scences GPU Path vs CPU BiDir
Posted: Fri Jul 13, 2018 8:08 pm
by B.Y.O.B.
Mesmerizing
FarbigeWelt wrote: ↑Thu Jul 12, 2018 10:49 pm
Well it is not a pure velvet material, it is a mix with a null
Instead of mixing with null, use the opacity slider of the material. This renders a lot faster.
Mesmerizing
Posted: Fri Jul 13, 2018 8:20 pm
by FarbigeWelt
Thanks, B.Y.O.B
Instead of mixing with null, use the opacity slider of the material. This renders a lot faster.
Well, you have to try it. It makes really a huge difference to use null material and mix instead of using opacity only. At least in version 2.0 with CPU Bidir. I will show the difference soon.
Glossy and null
Posted: Fri Jul 13, 2018 11:24 pm
by FarbigeWelt
EDIT: Picture replaced with long time render.
Yet another miracle: reasonable use of glossy coating. At the moment I did not get what I intended. Hoping soon to hit my target.
- Glossy Coating mixed with null CPU BiDir 6:45 h 1017 Samples
Matte Study
Posted: Sat Jul 14, 2018 6:32 am
by FarbigeWelt
Re: Test scences GPU Path vs CPU BiDir
Posted: Sat Jul 14, 2018 9:33 am
by B.Y.O.B.
I can reproduce a difference between mix with null and equivalent opacity.
It could be a bug, or maybe it is an expected behaviour, I'm not sure.
I think it would be good to log this in the LuxCore bug tracker, with an example scene.
Glossy Coating is difficult
Posted: Sat Jul 14, 2018 11:06 am
by FarbigeWelt