Animated render region

[GabrielS]

Hi,

A render region that move and resize frame per frame, following an object or dumy can be usefull in case of rerendering a part of animated scene (obect moving inside au room...)

Correct me if I'm wrong but vray has this sort of thing with vraysphere fade.
It's a Gizmo sphere that you can link to your animated object.
Juste the area inside the sphere is rendered.

Now that vray and Corona are together, maybe a possibility to have this option quickly?
Thanks

[arqrenderz]

What about render selected?

[GabrielS]

In certain cases the render selected mode is note usable.

For example, you have a moving object in the scene (a cube of 10x10x10)
But your client want to change this object to another cube (5x5x5).

You can't just render this selected object, because in comp the first object will be visible behind.

I have done a workaround. A cone linked to the camera and with a lookat constraint to the object. The cone have a pure black diffuse, and a ray switch transparent for GI, reflection, refraction

That work but, it's a bit complicated

[iancamarillo]

in the past I've had to rerender an animation because the client wanted to remove the people. So I slightly shelled them, set their refraction to 100%, rendered with object list and comped the raw refraction pass over the original sequence. However, you start to encounter errors with shadows, reflections, etc. In the end it was easier to rerender the entire sequence. A good learning experience about optimizing scenes and getting more accurate info from the client. So if you'd like to have the flexibility of changing objects in the scene, maybe it would be best to budget time for this design process?

[GabrielS]

Thanks for your advice.

But right now i just suggest to devs to add a new useful feature that can save a lot of time in some case where rerendering all the frames is a pain and deadlines are short