Wormhole-like glass distortions

[tricky]

Hi y'all!

I am rendering some glassy office buildings and have a very slight Bercon noise (size 4) in the bump of the glass material, with the value of the bump set to 1. Mostly, this looks OK (though I have yet to try it animated), but in the area indicated in my attached image, the glass seems very distorted. I can't be sure why this is happening, but wondered if anyone had any suggestions? Could it be that I am seeing panels of distorted glass through other panels of distorted glass?



Here are the basic settings for the glass:-


What do you think?

[Morne]

if the geometry is from autocad, did you remember to clear smoothing groups for all glass objects?

[flino2004]

Try select the whole glass and explode in elements, sometimes helps when you import geometry from AutoCAD.

[tricky]

The geometry is a railclone object created from a polyobject created in Max. I will try clearing any smoothing groups from this polyobject and see what happens.

[tricky]

I tried removing all smoothing from the polyobject but no change.

Any other ideas?

[Macker]

Do you have duplicate geometry/z fighting? I had some incredibly strange results once when I accidentally had 2 references of the building in the same scene.

[rivoli]

have you tried setting the refraction IOR to 1,0? will get rid of distorted refractions, if that's the problem..

[tricky]

have you tried setting the refraction IOR to 1,0? will get rid of distorted refractions, if that's the problem..

Will give that a try.

EDIT: That seems to have worked. I've set IOR of the refraction to 1.01 (1.0 makes it look speckly in the material editor). Thanks Rivoli.

[rivoli]

well glad it helped, and yes, 1.0 does look weird in the mat editor preview.. forgot to mention that. it should be working allright anyway when you render it, if I remember correctly.