scene with 3 glass cups. everything looks fine, but after i switch the device to i7 3610QM(OpenCL):
very cool artifact. i think it's a problem of floatingpoint precision..

still too noisy after 14h rendering on a PentiumE5300 and a Core 2 E7500

MNCR max is not a good option

well yes the IGS from 2.2 behave abnormally in 2.4.13

i tried the 2.4 exporter, the same result

now i m gonna try 2.6. good luck to myself. and everyone here are very kind thankyou!

You would need to use the "precedence" setting to tell Indigo which of the two materials to render in the intersecting/overlapping volume. thankyou for your explaination, i m now changing the settings. btw, as you described, intersecting two glass material is not good. but what about intersecting g...

i replaced the glass material with a diffuse one. it's still black.

it's a shame that i have to switch the whole project back to indigo 2.2. at least in 2.2 everyting works.

btw why shouldnt i intersect glass meshes with other meshes, that i always do?

Borgleader wrote:a) Are the cylinders closed volumes? From this angle I cant see if the end caps are present
b) Did you check that your normals are correct?

thankyou but i m quite sure there's nothing wrong in modeling: it does have caps and, all face normals are correct. this model works quite well with indigo 2.2

dougal2 wrote:Which version of Blendigo is that ?

blendigo 2.4 stable. maybe i should rebuild this material in 2.4, instead of moving it to 2.4 from 2.2

nothing went wrong with this material when previewing, but when i started rendering with the whole scene...

i m new to indigo 2.4, this never happens in 2.2