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arnold and pbr mantra


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Is there a different between arnold and mantra? Or am I do something wrong? I try to load a simple bevel box but the mantra is much more yellow from the enviroment hdr than the arnold (blue does)

Is this a interpretTion issue? The hdrlook the same with shadows, but the color seems to look yellow i one... blue i the other.

Doent mean physical based mean that they should look almost i denticall in rendering?

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The Mantra render seems to be the same overall tint as the upper half of the environment map (the lower half should not be visible to these surfaces here).

 

My first two ideas: 1)  due to some mapping differences, the env image is mapped differently (flipped) in arnold, and you get the lighting from the bottom half instead (it has a colder tint)

2) there is a gamma difference on interpreting the texture, it can affect the saturation.

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A quick test comparing that HDR file* processed in sRGB and linear colour space and then run through an environment light/direct lighting in Mantra. Mantra goes cooler using sRGB. Is Houdini/Arnold both set up for linear?

 

* cropped from the Jpeg

post-8321-0-21094300-1389892377_thumb.pn

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