refractive samples change material color

# 1 13-04-2012 , 08:50 AM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

Hi guys!

I have some really weird problem here with a refractive material.

working with mia_material_x,
usually I testrender with refraction/reflection samples of 8. for final render I up the samples (low glossiness) to something like 64.

now in the final render the glass loses all its white shinyness and cool transparent look. the outcome is much darker than the preview rendering. if I compare both rendered glass sparts, the one with 8 samples has some lightgrey areas, a lot of white parts and pure transparent areas, whereas the 64 sample rendering for the same object shows a lot of darkgrey, some nearly black areas and all white areas are much less whitish. almost like you lay a dark occlusion map on top of it.

edit:
disabling cast and receive shadows on refractive objects makes almost no difference.
seems to be a pure sampling effect.

any ideas or is this normal behavior?

everything starts and ends in the right place at the right time.

Last edited by Falott; 13-04-2012 at 08:58 AM.

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# 2 13-04-2012 , 04:04 PM

Technical Director
Join Date: Feb 2004

Posts: 2,988

Ahh, back to the MIA eh? (Yes, I'm Canadian, and I say eh. Get over it.)

It's hard to tell without seeing a sample of the render.

Imagination is more important than knowledge.

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# 3 03-07-2012 , 04:43 AM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

Ah, just discovered that I completely forgot about this thread in the head of current projects..

I still fight against that problem with samples and reflection intensity. there´s a new thread where I posted a comparison picture to demonstrate:

https://simplymaya.com/forum/showthre...d=1#post339955

everything starts and ends in the right place at the right time.

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# 4 23-09-2012 , 10:16 PM

Registered User
Join Date: Sep 2012

Posts: 1

i have an issue with blinn material . after i create one, and then go to "textured channel"

and turn on " reflected color" to make my material all shiny, sumtimes later on if i click

a surface with that blinn applied to it, the shiny turns off, and i cant get " reflected color" to turn back on, unless i access the blinn from the hypershade menu, THEN hit " reflected color", then it turns back on....but if i click on an object again containing the blinn, itll turn off the shiny again....pretty please help?

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refractive samples change material color

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