Hello guys !
I have a problem with Mantra, when I'm rendering a simple mantra surface shader with Reflections On and Refractions On and Fresnel Blending Ticked, my refraction is black near objects.
If I unticked Fresnel BLending, it works. So what I need to know and do to solve my problem.
Thank you very much if you can help me.
Reflection + Refraction :
Refraction Only :
Mantra Black refraction near objects with Fresnel
11656 10 3- sliverfx
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- Sadjad Rabiee
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That's because Houdini doesn't render shadows for refraction, Transparent Shadows option in the light setting only work for opacity , Not refraction !
So you have two solution :
1. Add causticlight for generating caustic.
2. Use Fake caustic option , to use this option go to mantrasurface parameters –>Opacity–>turn on Enable Faux Caustics
So you have two solution :
1. Add causticlight for generating caustic.
2. Use Fake caustic option , to use this option go to mantrasurface parameters –>Opacity–>turn on Enable Faux Caustics
- sliverfx
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Thank you so much Rabiee for your quick and perfect reply.
I don't know why it doesn't work with the causticlight, but it works perfectly with “Enable Faux Caustic”
PS : Do you have an idead about how can I avoid the little “noise” of my sphere on my render ? (you can see it on the first picture) My : Mantra Sample is set to 8 x 8
I don't know why it doesn't work with the causticlight, but it works perfectly with “Enable Faux Caustic”
PS : Do you have an idead about how can I avoid the little “noise” of my sphere on my render ? (you can see it on the first picture) My : Mantra Sample is set to 8 x 8
- Sadjad Rabiee
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- Sadjad Rabiee
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- sliverfx
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Thank you for the file and the tips about increasing Sampling Quality parameter in the envlight settings.
It's Crazy. When I launch you file, the Caustic Light works like a charm. If I delete it, and create antoher one with the shelf tool, it works fine.
Therefore, in my original file, if I create a Caustic Light like above, anything change. It doesn't work.
Did you change something else to integrate perfectly the Caustic Light ?
Have good day
It's Crazy. When I launch you file, the Caustic Light works like a charm. If I delete it, and create antoher one with the shelf tool, it works fine.
Therefore, in my original file, if I create a Caustic Light like above, anything change. It doesn't work.
Did you change something else to integrate perfectly the Caustic Light ?
Have good day
Edited by - 2014年9月9日 05:54:23
- Sadjad Rabiee
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- sliverfx
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- Lewul
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- sliverfx
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- Lewul
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