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Rendering with Arnold in 3ds Max using the MaxtoA plug-in.
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Hey all, Quick Question. Does the hair shader for arnold work on standins?

14 REPLIES 14
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Message 1 of 15
sue-mari.sauer
614 Views, 14 Replies

Hey all, Quick Question. Does the hair shader for arnold work on standins?

 
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14 REPLIES 14
Message 2 of 15

It should. If you apply a shader to the standin, then the shader is applied to all nodes in the standin



// Stephen Blair
// Arnold Renderer Support
Message 3 of 15

3419-capture.png

So left side is Maya stand-in with Houdini fur and Standardhair Shader...... And right side is same hair and Shader but rendered in Houdini. Maya spec seems totally different to Houdini although they are the same Shader.

Message 4 of 15

Assuming you have the same version of Arnold on both computers, you're going to have the same shader on the curves.

But in Maya, you're also applying that hair shader to any geometry that might be in the ass file (if you applying the hair shader to the aiStandin)

Also, lighting may be different. Color management settings too.



// Stephen Blair
// Arnold Renderer Support
Message 5 of 15

So I checked that only the fur is in the standin.
Im using the hair shader from houdini in maya(exact same shader)
Only have a white skydomelight in both houdini and maya(same lights)
Have the same version of Arnold

Looks like the Spec is the problem.

3420-albedo.png

3421-diffuse-dir.png

3422-diffuse-ind.png

3423-spec-dir.png

3424-spec-in.png

Message 6 of 15

is your amount of rays and samples the same?
A higher amount of spec samples and especially spec rays will intensify the spec on the hair.


But based on the look of the 2 renders, the one from maya looks the most correct one based on my experience with the aistandardhair. So maybe check your colormanagement in houdini as well

Message 7 of 15

render setting are the same both sides too

3417-render-settings01.png

3418-render-settings02.png

Message 8 of 15

This looks like differnce in either render colorspace or the View transform of the render viewer between MtoA and houdini.

What colorspace are you rendereing in? If you save out an .exr and view it in a the same application, do you still get a diffeernce?



Ashley Handscomb Retallack
Arnold Support Specialist
Arnold Documentation | Arnold Downloads
Message 9 of 15

Will look into that now thanks Ashley, also so everybody knows I am doing a test to see if a Standard surface shader comes across correctly on the fur

Message 10 of 15

3425-capture02.png

So top left sphere is Houdini .exr viewed in rv. Bottom left sphere is Maya render of same sphere in rv. Right big sphere is Houdini .exr render viewed in Maya renderviewer. So as you guys can see the Houdini .exr displays the same as Houdini render view in the Maya renderview. It doesn't change to look like the maya render.

Message 11 of 15

Maya color space:

3426-image-1.png

3427-image-2.png

Houdini color space?

3429-houdinicolor.png

Message 12 of 15

Not sure if you saw my responce last week? But I think its color space. Is there a way to match houdini and mayas colorspaces?

Message 13 of 15

What is the colorspace of the textures? The colorspace of the file node in Maya?



Ashley Handscomb Retallack
Arnold Support Specialist
Arnold Documentation | Arnold Downloads
Message 14 of 15
Message 15 of 15

there are no texure maps assigned. Its just a shader with a brown color on it.

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