This is a Vulkan version of my OpenGL engine, efgl.
Sponza with directional lighting and 2048 lights. The directional light kind
of drowns everything out - this would look super cool with shadows.
At this many lights, almost a quarter of my GPU frame time is taken up by light culling. At 4096, that proportion grows to half. If I really cared about getting insane numbers of lights, I could probably accelerate culling with some kind of light BVH as described in the OG clustered rendering paper, but I don't really want to. I think I want scenes with at most a couple hundred lights and it seems like this will work great in its current state.
The other way to speed things up would be to
- Have less draw calls or
- Have less data to draw in my draw calls
To do either of these, I'll need to get my entire scene onto my GPU. From here, I can at least do a single draw call from the CPU. Next, I would implement frustrum culling and change that CPU draw call into an indirect one. Next would be occlusion culling, which I have a feeling would be the most helpful. With my naive forward rendering, I'm sure there's tons of overdraw happening.
I think my next goal is shadow mapping my directional light, then skyboxes, then IBL.
After all that, I'll see what I can do to make this a truly GPU-driven renderer.
Added mipmap generation and anisotropic filtering!!
Sponza again, this time with Cook-Torrance specular BRDF in
the fragment shader. Used reinhard tonemapping and gamma correction as
well.
Model loading with texures. Needs some mip-mapping though, check out the Moire patterns!
Model loading and depth testing
Is that what I think it is?? A triangle!
Relatively close to drawing a triangle!!
Still not even close to drawing a triangle!!