Boost Indirect Diffuse in Mantra

[B.Walters]

Is there a way to boost the indirect diffuse contribution of objects/lights/shaders in Mantr'as PBR render?

 

I know arnold has this built into the light which is very handy.  I was hoping for something similar in Mantra, but for the life of me I cannot find anything...

[fathom]

i was thinking about this the other day.... i don't think there is any way aside from as a post-process in nuke or something.

 

or you could maybe hack the pathtracer in some fashion. 

[Guest tar]

You add a multiple to the Indirect output of the compute lighting/ pbrlighting1.

Indirect.hiplc

[davpe]

you can create a light that only cast indirect lighting. that is probably the simplest way.

[jkunz07]

You can use the switchlightingbsdf VOP and multiply the indirect and direct components to taste

 

http://www.sidefx.com/docs/houdini15.0/nodes/vop/switchlightingbsdf

[B.Walters]

Thanks everyone - both the switchlightingbsdf VOP and the indirect light both worked!

 

(Although neither was ideal - I either have to double the lights in my shot, or modify every shader... seems like there should be a parameter on the Mantra ROP)

[davpe]

on Mantra ROP, you can alter "Color limit decay" parameter. it is not boosting the indirect light itself but it can make it decay faster or slower.

[Mzigaib]

You could also use GI light with photons and in this light you can boost just the indirect contribution, as far as I know it is one of it`s features.

I hope that helps.

Cheers!

[Guest tar]

On 13 April 2016 at 10:48 AM, B.Walters said:

(Although neither was ideal - I either have to double the lights in my shot, or modify every shader... seems like there should be a parameter on the Mantra ROP)

 

Sounds good.. can you send a Rfe, Request Feature Enhancement, to SideFx. On their site, Support menu, SubmitBugs and Rfe.

Thanks!

Edited April 18, 2016 by tar
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