Forums » CentiLeo for Cinema 4D
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No exclude function in rendering?
 
LU
User  Posts: 9
Sep 14, 2021 02:45
In some cases, I need to exclude something to make alpha channel for them(but not disable them, they are still functional for rendering purposes , unlikely I can't find a way to make this happen. If there is a command like c4d Compositing tag that you can disable anything you don't want, that would be very handy.

object ID doesn't function, and there is a bug for it, when you assign it, there is nothing (no tag)appear in object manager, so that this way is cut.
 
Administrator  Posts: 522
Sep 14, 2021 06:51
Hi LU! So you want to exclude an object from alpha channel image but not from beauty image using an object tag?
Actually there is no currently such functionality, but exclusion system and lighting / shadow excludes/includes are planned. I know how to do them now in genereal and collect user experiences. They can be implemented in a different way. I would appreciate if you would advise the most convenient examples.
 
LU
User  Posts: 9
Sep 15, 2021 10:10
What I mean is that when you render some translucency or transparent object, you need to keep other things on, like to keep back stage on , or other related objects on, so that the transparent effects will look correct (because transparent/ translucency will be impacted by environment and other surrounded objects). But sometimes I want to keep the transparent objects with the same look, just need to change background , so that I need alpha channel for them. The problems is, there is no alpha channel for this scenario. See the picture

in this scene, I want to keep that look above, but that doesn't have alpha channel for the small objects; while, when I turned off the back stage object, it does have alpha channel for the small objects, however, the look for them are different. I want to keep above look, don't turn off back stage, and still have alpha channel for small object.

in C4D native renderer, it has a tag called Compositing, you just apply this tag and click off "Seen by Camera", this could be achieved instantly. see picture below;
 
Administrator  Posts: 522
Sep 16, 2021 13:34
Thanks LU! More or less I understand this. I will test Composite tag more to do something like this.
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