Hi,

I have a HIP file in which I would like to render a subset of objects to one layer and the rest to another. I wish to do this to enable me to process them differently before compositing them.

Which OP/documentation should I refer to for more information and example.

Cheers

It's as simple as setting up a couple of Mantra ROPs and putting the objects you want in each ROP into a comment separated list in the “Visible Objects field in the ROPs ”Standard“ tab.

Say you have two ROPs, ROP1 and ROP2, and 4 OBJs, OBJ1, OBJ2, OBJ3, OBJ4.

YOu want OBJ1 and OBJ4 in ROP1 and OBJ2 and OBJ3 in ROP2.

The ”Visible Objects“ field in ROP1 should look like this:

OBJ1,OBJ4

The ”Visible Objects" field in ROP1 should look like this:

OBJ2,OBJ3

note there are no spaces

The other syntax for the Visible Objects parameter is:

OBJ1 OBJ4

If you have a lot of objects, you can create object groups then specify the group name(s) in the Visible Objects parameter:

@layer1

or

@layer1 @layer3

Cheers!
steven

I prefer to usea pre-render script ( in the scripts tab) similar to the following
opset -d off /obj/*; opset -d on /obj/obj1,obj2

or better, with obj groups
opset -d off /obj/*; opset -d on /obj/@objgroup

the reason being that to use “visible objects” the objs need to already have their display turned on and sometimes that isn't the case.