Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: cecofuli on 2015-02-03, 17:55:01

Title: Problems with glasses and "Z axis"
Post by: cecofuli on 2015-02-03, 17:55:01

Hi,

as you can see in the images, if we have a vase with flat basement, and if I don't want to see the black contact area, I have to move the vase slightly on Z axis.
Maybe it will be better to find some smart solution.

(http://www.francescolegrenzi.com/Temp/Corona/0062_Glass.jpg)

Title: Re: Problems with glasses and "Z axis"
Post by: PROH on 2015-02-03, 18:57:31

Hi. Can confirm this problem in A6. Only solution I have found so far, is to move them apart (just like you show).

Title: Re: Problems with glasses and "Z axis"
Post by: romullus on 2015-02-03, 19:07:16

I don't see why did you report it as a bug? Every render engine do that. It's not renderer, it's user should take care about coplanar surfaces. If you don't want to lift objects above surface, offset its pivot point slightly instead.

Title: Re: Problems with glasses and "Z axis"
Post by: cecofuli on 2015-02-03, 19:17:46

I know =) . I wrote "problem", not "bug". Ok, maybe not the right position of this thread.Anyway...
For example, in V-Ray there is a "secondary rays bias" (http://help.chaosgroup.com/vray/help/150SP1/examples_switches.htm) option to solve this problem. I think it will be useful also in Corona.

Title: Re: Problems with glasses and "Z axis"
Post by: Ondra on 2015-02-04, 11:29:57

as romullus said, every renderer does this - it is the "garbage in, garbage out" rule. Solving this in renderer is not necessary, and maybe not even possible.

Title: Re: Problems with glasses and "Z axis"
Post by: cecofuli on 2015-02-04, 11:48:24

Yes, but in V-Ray, if I remember correctly, we hadn't this problem, cause the "secondary rays bias"  option.
Also, it  could be useful for imported bad geometry with two polygons on the same position.