-Re-purposed an unused boolean in RPI::Cullable for previous frame's visiblity to instead represent objects that are hidden in the simulation.
-Updated MeshFeatureProcessor::SetVisible to set this value on the cullable.
-Updated the MeshComponent to handle visiblity changes by not rendering the mesh instead of deactivating and/or reactivating the component.
-Updated the AtomActorInstance to handle changes to the visibility from the ActorComponent.
Tested by creating two entities with static mesh components, on entity hidden and the other visible. Plus three entities with actor components, one where the actor is visible, one where the entity is visible but the 'render character' setting on the actor component is disabled, and one where the 'render character' setting is enabled, but the entity is not visible.
For each of these 5 entities, I added them as 5 loose entities, 5 entities that were children to a parent entity, and a slice with all 5 as children to a parent entity, and tested toggling visibility of the parent entities.
For each of these 3 sets of 5 entities, I added them directly to the level, added them all to a layer where the layer was visible, and added them all to a layer where the layer was not visible, and tested toggling the visibility of the layers.
Tommy Walton
Steve Pham
Doug McDiarmid
alexpete