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3ds max concave reflection problem
show user profile  ioioio
Hi all,
Does anyone know why are reflections distorted on concave surfaces like inside a hemisphere . Using 3ds max 2013 design. The same thing happens with vray and mentalray so I asssumed it's not a render engine problem.

Any help apreciated. Thanks


Heres what I mean [IMG]http://i39.tinypic.com/2rzfdrn.jpg[/IMG]
read 549 times
5/29/2013 8:00:01 PM (last edit: 5/29/2013 8:04:39 PM)
show user profile  Kirk
Probably something to do with . . . wait for it . . . physics.

Either that, or the Kingons. When in doubt, it's always the Klingons fault.

Kirk out.
read 532 times
5/29/2013 9:28:12 PM (last edit: 5/29/2013 9:30:02 PM)
show user profile  ioioio
I'm sure it's not a normal behavior and has nothig to do with physics. It works fine on convex surfaces. It should have a smooth transition not a chopy one. The sphere has plenty of polygons to work with so that's not the problem. Anyone else?
read 514 times
5/29/2013 10:08:17 PM (last edit: 5/29/2013 10:08:17 PM)
show user profile  Kirk


Kirk out.
read 499 times
5/29/2013 10:35:03 PM (last edit: 5/29/2013 10:35:03 PM)
show user profile  Ali3D
it looks like there is a mesh smooth group problem.
you gotta check if all the polygons are in the same mesh smooth group
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http://Ali3D.ir

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read 450 times
5/30/2013 3:27:32 AM (last edit: 5/30/2013 3:27:32 AM)
show user profile  digital3ds
maybe slap a uvw map over it
- Mike Sawicki




read 445 times
5/30/2013 3:40:18 AM (last edit: 5/30/2013 3:40:18 AM)
show user profile  ioioio
Thanks guys for your replys.
@Kirk I can't argue with what you said there, however it still looks weird to me. I mean I'm looking at a chrome bowl or smth and dont see this distortion naturaly.
The sphere is made out of 60 segments with the same smoothing group and I don't know if the uvw affects the reflection in any way unless theres a map applied to it.

Heres another test. I dont know it may be me :-?

read 422 times
5/30/2013 12:27:21 PM (last edit: 5/30/2013 12:30:21 PM)
show user profile  Nik Clark
Looks normal to me.





read 413 times
5/30/2013 12:37:17 PM (last edit: 5/30/2013 12:37:17 PM)
show user profile  ioioio
I guess youre right though.

I guess case closed then. Thanks.
read 406 times
5/30/2013 1:00:07 PM (last edit: 5/30/2013 1:00:52 PM)
show user profile  digital3ds
smoothing groups and uv maps deff do affect how your reflections will turn out

there's also a lot you can do within the material itself (depending on which you're using)

yea, the render looks good... akward, but good
- Mike Sawicki




read 376 times
5/31/2013 5:11:28 AM (last edit: 5/31/2013 5:11:56 AM)
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