So I've now gotten a lot of things working in my Vulkan ray tracer – https://github.com/sjhalayka/sw_partial_reflectivity​

• Reflection and refraction (Fresnel)
• Chromatic aberration
• Multiple shadow-casting lights
• Multiple textures
• Fast glossy (noisy) reflections
• Fast blurry (noisy) shadow edges
• Volumetric fog via ray marching/tracing
• Large-format screenshots

I recently redid the fog code, and it's working how I want it.

Looks good.

Quick improvement that comes to my mind is step in fog - I assume you see the banding - I've used small random offsets when sampling it to break the banding (on the other hand that will and small noise instead of banding). It tends to be easier/possible to converge that way.

Thanks again for your input. I’ll perturb the rays and see what it looks like. ?