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F00f C7c8 avatar image
F00f C7c8 asked ·

Cloth shader for Arnold 5?

Does anyone know if there's any kind of dedicated cloth shader out there for Arnold 5?

I've been spending a lot of time trying recently trying to get cloth looking right in Arnold, and it seems like it's certainly possible to hack together something with the standard_surface that gets you most of the way there, but not all the way. It appears like there's quite a bit more going on with cloth than a diffuse/specular reflection (similar to how hair requires a dedicated shader to look right).

I haven't been able to find much on the internet about this, especially in regards to Arnold. It appears like alShaders was supposed to contain an implementation of the Irawan shader at one point in time, but apparently there's some sort of sampling issues that never got fixed (plus it was written for Arnold 4.x). There's another implementation of the Irawan BSDF going around under the Thunderloom name (which apparently adds support for a WIF parser and a few other things), but given what I've read about the alShaders Irawan implementation, it doesn't sound like it would work that well even if someone ported it.

Is there anything else out there that will handle this sort of thing for A5?

shader
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Mads Drøschler avatar image
Mads Drøschler answered ·

We also have procedural weave patterns via OSL. So for some patterns, the baking is not needed.

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please can you tell me where the weave pattern osl shaders are?

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Mads Drøschler avatar image Mads Drøschler xebajac@zdfpost.net xebajac@zdfpost.net ·
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Lee Griggs avatar image
Lee Griggs answered ·

Sheen is available in the Standard Surface shader.

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D Flood avatar image
D Flood answered ·

Until there is a dedicated shader for fabric, the following workflow attempts to simulate fabric appearance with a BRDF shader, and the use of texture maps for threads derived from geometry. In other words, the secret to getting realistic fabric is to actually model the fabric threads, and then use this geometry to generate a highly detailed texture map. https://docs.sharktacos.com/texture/FabricArnold.html

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Zeno Pelgrims avatar image
Zeno Pelgrims answered ·

Max Tarpini has been working on an implementation:

https://twitter.com/max_tarpini/status/929866764598546432

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