ho bisogno di realizzare il materiale feltro per un progetto di arredo, con scarsi risultati.
L'effetto ideale è questo: Con bump e noise da lontano riesco ad avere un risultato semi-decente, ma appena mi avvicino un attimo o alzo la risoluzione i dettagli sono un disastro.
ho letto qui: http://forums.cgsociety.org/archive/ind ... 31015.html di usare due livelli di scattering uno dentro l'atro etc. ma va oltre le mie capacità..
what I've seen done that I thought worked Very well was to create a combination of several noise/fractal patterns into one another. Meaning: Create a fractal, under the two colors, create another one, making sure that it is a different size and seed.
Do this as many times as necessary (NOT more than a branch of 3, that would just be crazy)
You are going to want to play with some of that in your diffuse channel. Specular is the other big hit for getting this to look right. If you take a copy of the resulting fractal and change only the colors to a greyscale map and pump up the contrast using the output rollout on the final fractal.
Antialiasing will take all of the little particle right out of the image though. Supersampling is the way to fix that. Make sure it isn't already on globaly and turn it on for that object. (global supersampling will override your settings for the material) If your image is huge then you may not need to do that, but it would have to be really really big.
There are a few more things you can do, but that should get you a good start.
For a more expensive scene you can add displacement for those angled shots that you want to see some physical fuzz, but for a fairly flat felt, that should be necessary. We had to create some wool felt that was suppose to be about an inch thick so that was slightly more necessary.
How close are you going to view it? As said noise etc will help, also a painted diffuse map with some noise as well. I have a poker table on my site, not a close shot, just a simple painted map with some noise.
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