butt jointed reflection - why is it offset between tiles?

[Morne]

Hi all

Why would panels that are right next to each other reflect asif the one next to it is slightly tilted?

I'll try to explain another way: When you cheat a reflection in photoshop you overlay an image as your reflection. This image is seemless and reads as one.
But rendering the reflection with these panels it is asif the reflection was done seperate for each panel and then not lined up properly. I have a white reflection and white refraction with fresnel ticked

I hope that makes sense
the refraction does the same by the way

IOR is 1.6 which is correct for glass (1.5 to 1.7 for glass). If I set the IOR to 1 for refraction it reads correct, but isn't 1.6

[thablanch]

Is it a flat plane, if yes, you need a thickness on the geometry for the reflection to be ok. Put glass on a box = ok, glass on a single plane = not ok

[Morne]

my glass is 10mm thick

[Morne]

hmm ok why would a 10mm thick panel imported from autocad render differently than the same box modelled in max and applied with same material?

[jacksc02]

check that the ACAD geometry is all welded up, otherwise it wont be recognised as a "volume"

[Morne]

ok it seems if I fillet my 10mm thick glass by 5 on all edges in autocad, then in max the reflection/refraction is all messed up (asif the front and back of the glass panel is also curved). Weird. BUT, if I chamfer the edges by 5 instead of fillet, then all is well. Hello twilight zone

[Neilg]

Thats probably a smoothing group issue.

[Morne]

yes but what has the front and back of the glass to do with smoothing? It's just a flat area. I can understand the problem with the edges, but the rest should work. Not to worry though, for my current purposes the chamfer edges are fine.

[Björn Radler]

just select the faces and remove the smoothing groups for a test...maybee the problem is gone after that. A regular chamfer often behaves strange with smoothing groups applied.

Best regards