isolating objects for animation

[daveclive]

Hey,

I am about to animate components of a fridge in a kitchen environment and want to be able to isolate parts (doors, hinges etc)

I have attached storyboard examples

shot 1
fridge is shown in full kitchen environment

shot 2
Fridge doors are isolated, animation plays out to show handles and panels being installed

How can I isolate/fade out all the other objects and environment in the scene and leave the fridge isolated?
The display tag is not supported in corona so I cannot use that option.
The include/exclude options in corona do not work either as the matte/shape blocking objects is still calculated.

What would e the solution for this?

[Beanzvision]

Hi, one thing you could try is to animate the opacity channel of the objects you wish to fade out.

[ficdogg]

There's no easy way to do this inside of c4d for complex scenes. Animating the opacity is the only way to achieve that fade out, but in a complex interior with a large number of materials it's not really an option. Doing it in post is much easier.

[TomG]

Render masks for the objects you want to keep, use the masks in post to create the isolated version, blend from full render to masked version in post?

EDIT - this will also keep all reflections etc. the same on the objects that remain, otherwise those would fade out as the objects fade out; depends on which of the two results is the desired one of course :) If the reflections are meant to vanish as well, could just delete everything in the scene except the objects that are to remain, render that, and blend from full render to isolated in post, saves rendering every frame of the fade out.

[burnin]

:) Don't underestimate the power of Compositing.
The skill is in higher demand and better payed. Nuke it.  ;)

[daveclive]

Thanks for the replies.

Yes for complex interiors using the material opacity is not a viable option with a scene containing hundreds of materials/parts.

Compositing is the only way, just wanted to make sure wasnt not missing something. It gets a bit Compositing focused rather then 3D within c4D.
Having the display tag supported in corona or adding an opacity option to the corona compositing tag would solve these issues.

Please add. I'm sure this request must be a priority from the amount of users asking?