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Abid Sultan avatar image
Abid Sultan asked ·

the normal map is inverted !

im working on a scene with arnold in 3ds max and im using physical material ! my normal map is giving me a quite strange result i think i need to invert it or something ! need help with that pls !

normal map
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Mads Drøschler avatar image
Mads Drøschler answered ·

Use the legacy Normal map as it also shows in the viewport and works with Arnold.
Can you share some results and how you wire things up?

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so these are the results ! the last one is the result from arnold in 3ds max the tiles normal is quite strange i know there is something wrong in it but cant figure it out , the substance result is what im looking for !

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render-result.jpg (721.1 KiB)
substance-result.jpg (568.6 KiB)
materials.png (346.2 KiB)

There is a chance your normal map is created in a tangent space which is not rendering with Arnold currently, or correctly - for example MikkT Normals.

Which method do you use to generate the normal map?

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i got the normal maps from substance painter while using some tile material on the wall ! and i tried different material and textures from substance im getting the same result in arnold!

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Mr. T avatar image
Mr. T answered ·

If you're using DirectX normal maps just tick "Invert Y" in Arnolds Normal Map Node, it's called "Invert Green Channel" in 3ds Max's legacy normal node


inverty.png (98.9 KiB)
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Mr.T i have already done itt but it didnt help me out!
i tried it on physical material and arnolds standard surface too

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Mr. T avatar image
Mr. T answered ·

Try checking if substance painters normal map format for your projects is set to DirectX.

Arnold uses OpenGL normal maps, if your normal maps are generated with substance set to DirectX invert the green channel in the normal map node.

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hey Mr. T would u please guide me to right direction that how to invert the green channel in the normal map node ?

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