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how to assign texture to the specular rotation

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GELÖST
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excentriPMNA2
382 Aufrufe, 4 Antworten

how to assign texture to the specular rotation

I read the specular rotation description of arnold manual.(https://support.solidangle.com/display/A5AFMUG/Specular)

"It is possible to assign textures to the specular rotation. When doing so, it is advisable to avoid texture filtering. "
The manual explanation is not clear enough.


how can i avoid texture filtering?

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Nachricht 2 von 5
lee_griggs
als Antwort auf: excentriPMNA2

The sentence after that reads:

"This means disabling MIP-mapping and disabling the magnification filter, which by default is set to "smart bicubic." One way is to set the mipmap_bias of the image node to a strong negative value, like -8, which means "use 8 MIP levels higher resolution than usual"."

This can be found in the Arnold attributes of the Maya file node.

888-file.jpg

Lee Griggs
Arnold rendering specialist
AUTODESK
Nachricht 3 von 5
excentriPMNA2
als Antwort auf: lee_griggs

I think that disabling MIP-mapping is to to set the mipmap_bias of the image node to a strong negative value, like -8.
but, how is to disabling the magnification filter?
what type of the Filter Type must selected?

Nachricht 4 von 5
maxtarpini
als Antwort auf: excentriPMNA2

closest. but really for this kind of stuff you better get it by testing it directly with the renderer. keep AA settings low.. attach a file texture to a flat material.. set mip bias to -8 and switch between closest and any 'bi'xxx filter.. you'll see in an instant what filters your texture and what not.

Nachricht 5 von 5
excentriPMNA2
als Antwort auf: excentriPMNA2

thank you very much

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