Frustum Culling on big objects

If an object with a large mesh enters the frustum by just a tiny part, does the frustum culling algorithm draw it all anyway, or does it still give a performance gain by just drawing a small part of it?

Thank you.

Hi Beppim,

It wont be as costy as the full on screen object (as the pixel part wont be done). However in general one should be pay attention to the size of meshes so its a good balance between being able to reject object totally (when out of frustum) and keeping the number of draw calls low.

Please note that Unity static and dynamic batching will help for the draw calls part.

Hope it helps