Transparency/refraction problem

# 1 07-03-2012 , 01:26 PM

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Join Date: Dec 2011

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Hey guys, i've got a scene with pieces of glass in it. The scene has a sphere with an environment texture for raytraced reflections, also there a background plane with a texture so the pieces of glass can refract. Problem is when i render, instead of seeing the refracted background and the reflected environment texture thru the pieces of glass, i get a solid color in the shade of the background color. The background and sphere are hidden so the pieces of glass can be comped separately.6¦6Anybody know what am doing wrong?

Last edited by LocSp; 07-03-2012 at 01:28 PM.

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# 2 07-03-2012 , 07:10 PM

The thin red line
Join Date: Aug 2009

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Could you show a picture............dave

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# 3 09-03-2012 , 06:12 PM

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this is the render view

this is the persperctive view

this is a render with the background as you can see the glass particles refract a solid color

here, is a render with no background so you can see it better

Another thing i discovered is that it's a mental ray problem, this does not happen when i use the maya renderer.

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# 4 09-03-2012 , 06:25 PM

The thin red line
Join Date: Aug 2009

Location: England

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Try a mai metereal x with a glass pre set, also you might need to turn up you your raytrace refractions settings in the render setting quality tab..............dave

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# 5 09-03-2012 , 06:31 PM

The Nurb Herd
Join Date: Oct 2007

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yeah if its not your raytrace settings then it might be because you only have a point light. if you use an area or spot light you might get a better result.

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# 6 09-03-2012 , 06:45 PM

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i've used the mia material and turned up the the raytrace settings to 25 refractions and 5 reflections, and that's what you saw, but am gonna change the light and the material to mia material x and see what i get.

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# 7 12-03-2012 , 02:31 PM

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i still get the same results, i used the mia material x and an area light. am starting to think it's a bug cuz i reset both the render attributes and material attributes, i turned up both reflections and refractions to 50, and still i get the same results as long as i use the mental ray renderer.