MRC- turn off primary visibilty

[bweiglhselde]

hello. Simple question, but I couldn’t figure out. Other DCCs have a ‘Primary Visibility’ attribute on the objects. How do I translate this to UE? What would I do, if I want to turn off the primVis of an actor?

[mrmraw75]

I have been told that it isn’t possible. Please Epic: add this in a future release- this is crucial for proper compositing.

[BRGEzedeRocco]

Hi @bweiglhselde amd @mrmraw75 ,

Evan Hammel shared a solution to the question you’re asking in this post

MRC- turn off primary visibilty

Hi @mrmraw75 You can achieve the same effect as Primary Visibility by setting an object’s attributes to the following: Visible: Off Affect Indirect Dynamic Lighting While Hidden: On Objects with this will be invisible to the camera, but will show up in reflections, cast shadows, and affect GI. Alternatively, there is a Holdout setting which does the same, but also punches out the screen as black wherever it is visible to the camera. These both work in Lumen & path tracing.

Hope it helps!

[mrmraw75]

Hold out/Matte is entirely different game.

Thanks! I will check it out. Nonetheless: I strongly vote for introducing Primary Visibility. Not only because it boils it down to one checkbox, but also to streamline user experience.

[mrmraw75]

@BRGEzedeRocco Well, no that’s not what you expect from PrimVis Off. You get the bounce-lighting-that’s good. But the shadows are missing.