Gameobject is in view of camera, but not visible

Unity Engine
1

Is there a function that allows me to check if a gameobject is in the camera viewport, but the gameobject’s mesh renderer isn’t on.

Here’s what I’m trying to do. It’s a top down 2d game, and I’m trying to only render what the camera sees and turns off the render of gameobjects that aren’t in the camera’s viewport. (Kind of like a fake occlusion culling(Right?), but I ain’t got pro.).

Here’s the script.

if(gameObject.renderer.isVisible){
				renderer.enabled = true;
			}
			if(!gameObject.renderer.isVisible){
				renderer.enabled = false;
			}

gameobject.renderer.isVisible won’t work in this situation, correct? As it needs a renderer to be there, but when it isn’t visible it turns off the renderer and then once you go back, it won’t enable the renderer anymore.

Is there a function to replace isVisible? Or Perhaps there’s another way to do this?

Thanks!

2

This is called frustum culling and unity free already does it for you.

3

If you have to do it manually, use the renderers bounding box and test if they are in the view frustum using the tools in GeometryUtility Unity - Scripting API: GeometryUtility