composite layers

V-Ray V-Ray for 3ds Max V-Ray for 3ds Max :: General
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1

Hi

I am trying to build my image from composite layers in Nuke. The problem I am having is they do not match the beauty pass. The composite image is a bit bright and desaturated. Also the reflections are to bright on some parts.

In Vray 3

My color mapping settings are set to Gamma correction 2.2 Color mapping only (no gamma)

In nuke I am

Diffuse multiplied with Vray raw lighting

Diffuse multiplied by VrayRawGlobalIllumination

Plus the above

Plus Vray RawReflection

Plus VraySpecular

Any tips?

N

2

This isn’t entirely correct. I generally do not use raw reflection because you need additional elements to comp them together (I’m not sure what they are exactly).

What you can do is following:

Raw light + raw gi * Diffuse
reflection + specular
+ both result you should get exact same.

3

Can you show us how the beauty pass and composed image looks like?
RawReflection render element should be multiplied by the ReflectionFilter one.
Furthermore in order to calculate correct Raw render element the corresponding main render element and its filter should be rendered also. For example if you would like to export RawReflection render element you have to render also Reflection and ReflectionFilter elements.

4

Hi I’ve attached a screen grab.

Can you give me a list of the basic render elements and how to combine them.

Do people usually render the raw reflection + ReflectionFilter? or do they just render the reflection.

Thanks

vray.jpg
vray.jpg217×368 65.3 KB

5

The most basic render elements are:
GlobalIllumination
Lighting
Reflection
Refraction
Specular
Background

The sum of those elements should give the exact beauty pass. In Nuke you could combine these elements with Merge-node with Plus operator.

In general Raw Elements allows greater control than non-Raw elements but they are also more difficult to set up.
If compositing V-Ray render elements is a new topic for you it would be better to first learn how to do the composition using the basic-elements. Once you got it you can move to compose raw-elements and when you know how to do both you can decide which one is more suitable for your needs.

6

There are several posts from Vlado in the thread bellow - it might be useful to check them out.