Bump Map not Rendering with Mental Ray

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# 1 04-08-2012 , 07:16 AM

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I have a bump map on a blinn object that is rendering fine with Maya Software, but when I switch to MR it turns off.

I tried turning the Bump Filter to 0 as per this article:
https://download.autodesk.com/global/...ber=d30e656816

This did not help though.

Thoughts?

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# 2 07-08-2012 , 07:21 AM

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.......bump..

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# 3 07-08-2012 , 07:33 AM

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Can you post a pic of your bump map and your bump/material setup. It's difficult to say what it could be otherwise. user added image

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# 4 07-08-2012 , 09:48 AM

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Alright.

The first is the hypershade of my bump set up.
The second is the model rendered with Maya Software. Notice how the bump map does show.
The third is the model rendered with Mental Ray. Notice the bump map does not show.

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# 5 07-08-2012 , 09:01 PM

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In the "Color Balance" section of file3 ensure that "Alpha is Luminance" is selected.

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# 6 08-08-2012 , 03:31 AM

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Yep, it was checked already. Any other ideas?

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# 7 08-08-2012 , 07:36 AM

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What have you done to troubleshoot this?

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# 8 08-08-2012 , 07:39 AM

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Can you upload the scene file? I did a quick test this morning with a bump map applied to an anisotropic material and the bump is working under mental ray.

Earth: The crazy asylum of the universe.

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# 9 09-08-2012 , 12:27 AM

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Pixelza - what version of Maya are you using? I'm using 2012 - maybe that's the problem.

honestdom - I've done some google searches and tried playing with a few settings, to no avail. Most threads talk about attaching a bump map to a MR material, which I am not doing.

I uploaded my scene file here:
https://uploading.com/files/get/92875c27/BumpProb.zip

Last edited by featherlight53; 09-08-2012 at 12:40 AM.

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# 10 09-08-2012 , 07:20 AM

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Hi Featherlight, in the bump node reduce the filter offset. A value of 1 blurs the bump texture completely causing you to loose the bump detail.

https://download.autodesk.com/global/...ber=d30e570978

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# 11 09-08-2012 , 09:46 AM

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Ah yes! That was it! Not only did I have to reduce the filter offset, I had to reduce it all the way down to 0 (0.05 did not render the bump map at all). Just an interesting anecdote.

Thanks for the help.

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