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lyonel

colored shadows by refractive object and exports components

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Hi there,

 

 

A good friend of mine recommended me the forum, so here I am :). I started to learn houdini a week ago, I'm specialized in rendering, and I have a couple of questions regarding mantra and some special settings.

My first issue is that I cannot recreate the refraction effect that allow me to color my shadows. The light is going through a red transparent object, so the shadow projected from that object shoudn't be that dark, but less opaque and a bit redish. For those of you that are familiar with vray, the option in that renderer is called affect shadows, in the vray material refraction tab.

 

post-11545-0-64666300-1399447740_thumb.j

 

 

The second weird thing I have is regarding the image planes that should allow me to render extra aov. I do understand the concept of "export components" assigned to all the image planes that get the component attribute. But what if you want to have, let's say for the direct lighting (per components) image plane, the diffuse component only, and for another image plane (indirect lighting per components for instance), you want diffuse reflect and refract ? If you put diffuse, reflect, refract in the export components, you will have diffuse, reflect and refract for all the image planes.

 

post-11545-0-73953500-1399447737_thumb.j

 

 

I'm not sure I'm super clear in what I'm saying, so please let me know if that's not understandable. Thanks in advance for your help. I might come back with other questions later :).

Cheers !

 

Lyonel

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Guest tar

What's your Refraction Color?

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It's red. I have my diffuse all black. And I'm using mantra pbr.

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Ok, this is working with that shader.

But what is the difference between the mantra surface and the glass dedicated shader ? Where is the option that make the difference ? Why is the mantra surface shader missing that obvious option (or what am I missing) ?

Thanks anyway !

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You can enable the colored shadows by toggling faux caustics in the mantrasurface Opacity tab.

You can then adjust those shadows using the inside and outside IOR in the Settings tab.

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That is working too. Thanks so much for the help guys.

Any idea for the second question though ? That one is a bit trickier I think.

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Guest tar

Second question: that's current implementation, new to H13 AFAIK.

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