VRayDirt - different radius for RGB -not just for one channel

[ultrasonic]

Hey,

i think it would be extremly useful to have the occlusion radius split up to RGB specfific radi. I also think that it would not be more computation-intense, wouldn't it?

would help very much in comp if one could choose between different occl values.

any chance to see this feature soon?

cheers
Oli

[pechart]

+1! Very good idea, used that approach on an earlier mray project, compers liked it.

[ultrasonic]

any news here? seems not too complicated too me....if anyone else would consider this a good idea please say it, since this would maybe increase it's priority....

cheerio
Oli

[Mr.Hoo]

+1 for me!!!

would be a seriously great thing

Cheers

Dominik

[Metzger]

You can always do a texture add in Maya with 3 Vray dirt textures.

[LarsSonparsson]

So what is the difference for 3 separate dirt elements?
Usually I use only one for occlusion and maybe second for dirt.
When saving to exr, there is enough information to ramp occlusions I need.
If the calculation for rgb occlusion element might be any slower than the current b&w,
then it's definetelly no go.

Just another pov, before getting exited.

Any thoughts? Vlado?

[MathTheRender]

the seperate rgb channels output is a great idea! what i would like to have is teh ability to change my output with a curve or a graph, however you want to call it. like an falloff graph in max. Wouldent that be helpfull?

[ultrasonic]

You can always do a texture add in Maya with 3 Vray dirt textures.

Now the question would be how much impact 3 vray dirts have on rendertime....my idea was to put the computation for 3 different radi in one dirt sample. Your idea seems to need 3 samples which would mean triple rendertimes...
@chaosgroup: is that assumption right?

cheerio

[ndeboar]

really wouldn't be that hard to pump three dirt maps into the RGB channel of a Ramp, and then plug that into the extra texture slot of the render elements. You could probably automate that with a python script.

[ultrasonic]

really wouldn't be that hard to pump three dirt maps into the RGB channel of a Ramp, and then plug that into the extra texture slot of the render elements. You could probably automate that with a python script.

this is the same as Metzger suggested and i still suppose that this may have a larger impact on rendertime than upgrading the VrayDirt node to do it with only one dirt sample and different radi.

[ndeboar]

in that case, just render your occlusion with a large radius, and you can drop the radius in comp by adjusting the gamma.

[ultrasonic]

Before suggesting sth. like this please try it for yourself...you will see that you will never get the same result by just grading the occlusion pass.