How to "Normalize" a texture in maya and vray??

Common Common :: Render Theory
1

Please take a look at these pictures, I have a problem using vray 2.0 and maya, render texture problem.

Thanks!

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2

Which picture?

Best regards,
Vlado

3

Uploaded the pictures!

4

Hm, I don’t see why this would not work with V-Ray; can you post a .ma file with your shading network for V-Ray?

Best regards,
Vlado

5

Hello Vlado,

Thanks for your reply. Here are the rarred files both ma and mental ray and vray. Also the hdri content.

http://www.filesonic.com/file/3999459254/vray\_question.rar

It’s about ~16 mb.

Thanks!

6

Vlado,

Could you please take a look at the ma vray files!

Greetings Wim

7

Yes, but I’m somewhat at a loss about what you are trying to do - a shadow catching material? I noticed that in the mental ray scene you used a surfaceShader, but in the V-Ray scene you used a VRayMtl material.

In any case, the VRayMtl material will clamp the diffuse texture in the range black-white (since it tries to be physically accurate) and it looks like the multiplyDivide node is producing values > 1.0. We can probably remove the clamping for non-GI rays…

Best regards,
Vlado

8

Ah I see, you’re doing what we’ve done in our MR class.
I had completely forgotten to ask about this as well, yeah iirc it’s just the clamping thing Vlado.

9

Hey Vlado, thanks a lot for your reply.

I am using a mia_material in the mental ray scene. Mental ray does not clamp diffuse values to 1, and Vray does, I know
its physical correct, but is there any way I can make vray not clamp it?

What I am trying to do is like have a surface shader but still capable of receiving shadows and/or any secondary illumination/occlusion.

How can I remove that clamping that vray does to the diffuse shading?

Thank you so much

10

Hello Vlado,

Someone told me before that it’s due to the clamping of vray materials, like you said… is it possible to put some maya/vray node in the middle of the shading networks so it doesnt clamp?

Thank you Vlado

11

Normalize a texture in maya and vray

Hey Vlado,

it’s been some weeks, did you found any workaround for this issue? I would really like to apply this in vray.

Thanks a lot

12

I know this hasn’t been spoken about for a little while but I’m just running through my MYA214 class again, and thought I’d give class 2 a go with VR.
It now works :slight_smile:
Under the lighting/shading drop down we have V-Ray baking options which seem to work correctly as the MR does. If you’re following the class just ensure that your image format in the main render settings window is set to HDR.
I don’t remember if these bake options were here on the previous vray 2 release but all good now :slight_smile: