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View Full Version : Vray- my glass is...bright green? Normals issue?


Richard7666
07-01-2011, 01:16 PM
Got this model from Turbosquid, the same glass material is applied to both headlight covers and windows; the headlight covers I made myself and the windows were part of the Max file I converted to obj.

Does anyone have any idea why the windscreen is green? It should be slightly reflective transparent.

(Note there are a lot of plain VrayMtl 'lambertian' materials on parts of the car I haven't set up yet, such as headlight backing.)

here is a file demonstrating, render with the camera labelled 'VrayCameraPhysMovable' if anyone wants to have a look! http://www.filedropper.com/glasstest

http://img52.imageshack.us/img52/3286/car1gp.jpg

bazuka
07-02-2011, 08:07 AM
can u show us the shader u used?

MikeBracken
07-02-2011, 08:15 PM
I had a similar problem in Vray for Max. It was the normals of a glass object. Both sides facing inward. Once reversed it went away. Have you checked the normals ?

Regards,
Mike

Richard7666
08-05-2011, 06:58 AM
Same thing happened on another model I've imported from Max as an obj. When I take the poly cube from the imported obj, and create a new poly cube natively in Maya right next to it, and apply the same material, the Maya native one works fine.


I have checked the face normals, they are fine.
I have checked that there are no errant faces.

This is driving me insane.

here is a file demonstrating, the larger pane of glass is made in Maya, the smaller is from an obj. if anyone wants to have a look! http://www.filedropper.com/glasstest

(Render with the camera labelled 'VrayCameraPhysMovable' as it is set up for sun&sky)

EDIT:

GOT IT! Seems the object itself had 'visible in reflections' and visible in refractions' unticked under Render Stats in its attributes. Why the obj would do this is beyond me : /

djx
08-07-2011, 12:02 PM
Why the obj would do this is beyond me Its very common, and I dont know why either. And even though I know I should always check it still seems to trip me up at least once per project.

David

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