Glass gone Bad

[CliveG]

Hi All,

 

I'm wondering if anyone can shed some light on this glass problem....

 

I've used this material 100 times with the same render settings also 100 times with no issues.... but now I've gone and messed something up resulting in the awful relections on the attached, all out of place and abrupt.

 

Could this just be one of those modelling quirks (I model in AutoCAD) or have I messed up my falloff or something?

 

Any suggestions?

 

[ATTACH=CONFIG]41657[/ATTACH]

[Fran]

Check to make sure you don't have a light object intersecting your geometry.

[Ismael]

“Could this just be one of those modelling quirks (I model in AutoCAD) or have I messed up my falloff or something?”

Perhaps. You can just draw a simple window pane, throw it in the scene and see if it shades the same? For speed, do a region render. Of course apply that 100x proven glass material.

Another thing is rendering with GI “From File” and having moved the camera too far of without recalculating.

[CliveG]

Thanks all.... no light objects intersecting but when I do a test as suggested with a random pane of glass dropped in the scene, that renders OK.... so I guess it answers the first question: it would seem to be a modelling error.

 

I'm very particular about interfering objects (which is why I still model in AutoCAD as I'm more confident about tolerances etc) so I'm sure that this isn't an issue, so can't really see what would cause the error. I'll try to attach and weld the glass and frame into a multi-sub and see if that resolves it, otherwise I don't really know how to avoid this happening next time - Any suggestions?

 

Vray and Max are fantastic when everything works 1st off - when anything doesn't quite work the "newbie" in me comes out and I go around in frustrating circles.

[Crazy Homeless Guy]

The picture isn't useful because I am not sure what I am supposed to be looking at.

 

However, ...I would try welding the verts on the glass, or set them to weld on import/link if possible. Glass with physical like parameters need solid geometry in order for the refraction to work correctly.

[CliveG]

Just a quick post script and a subsequent question.

 

Trying to find out what went wrong with the modelling, I think I have established that it was due to the model being a million miles from the 0,0,0 origin in Max. Close examination revealed numerous modelling innaccuracies that I wouldn't normally expect. This idea of "needing" to be anywhere in modelling space is a bit alien to an AutoCAD-ophile like me and it's something easily addressed in future from within AutoCAD prior to importing the geometry.... BUT is there any adjustments in my MAX setup that could resolve this retrospectively or mitigate this issue....?

 

Cheers