Hello, I’m doing a basic test to see the impact of static objects on draw calls when using Lumen.
The test is a Directional Light and 4 of the basic shapes that come with Unreal 5.1 (Plane, Cube, Cone, Sphere):
It appears every unique static mesh adds 10 draw calls except the first one which is only 5. An empty scene with just a light is 2 draw calls.
10 draw calls for an object with a single material seems so heavy is there a reason this is so high? I’ve seen recommendations that 1-2k draw calls is pushing the limit so this seems very limiting. Also why is the first shape only 5 while the others are 10 each?
Thanks for your time!
Screenshots for proof using UE 5.1 and showing that nothing in the viewport is selected etc.
Full scene 37 draw calls:
With Sphere removed it’s 27 draw calls:
With Sphere + Cone removed it’s 17 draw calls:
With Sphere + Cone + Cube removed it’s 7 draw calls:
With just a light it’s 2 Draw calls:
