Why use RAW render elements rather than VrayReflection, VrayLighting, etc.??

[danb4026]

Is there a reason that some people use the RAW render elements rather than the straight forward, simple render elements? It seems somewhat more complex and I am not sure whether the benefits outweigh the trouble. Insights?

[Craig Ramsay]

I use them now and again. For example, if I'm working on an exterior and I decide that the reflections on the glass are way too subtle, the VrayReflection element isn't really going to help me boost the look of the reflection if I comp it in. However, if I use VrayRawReflection I can make the glass 100% reflective if I like or change it's opacity to suit.

 

Not quite sure if that's the way the element was intended to be used but it works for me.

[BrianKitts]

Agree with craig, I use it for boosting reflections and also to replace shadows.....

 

When doing still work sometimes I render out a matte to replace the 3d grass in the scene with photgraphed grass. Problem is you lose your tree shadows. So the rawShadow allows you to reapply the shadows back on to the new grass that has been masked in.

[Stephen Thomas]

Basically the 'normal' passes have already been multiplied with the diffuse, whereas the raw passes haven't. If you need to modify the diffuse element (as described above) independently of the reflection/refraction for example, then go for raw. Otherwise stick with the regular ones. It's just a question of figuring out how much control you want/need over each independent element.

[notamondayfan]

Basically the 'normal' passes have already been multiplied with the diffuse, whereas the raw passes haven't. If you need to modify the diffuse element (as described above) independently of the reflection/refraction for example, then go for raw. Otherwise stick with the regular ones. It's just a question of figuring out how much control you want/need over each independent element.

 

This is true, but VrayReflection = VrayRawReflection * VrayReflectionFilter

 

It just gives you more control over the relfection, so you can lighten / darken the VrayReflectionFilter to adjust the amount of reflections.

 

This is also the same for refractions.

 

Deano