final image at 1280×720 resolution with 2048 samples per pixel, using a Halton sampler and a Gaussian pixel filter with a 2.5 radius for image reconstruction.
The render took approximately 7 hours, with a maximum path depth of 50 bounces.
I extended my path tracer to support participating media, including medium tracking along rays, density grid intersection, and volumetric sampling. The system supports both OpenVDB and NanoVDB volumes, enabling volumetric effects such as cloud-like media inside complex geometry.

some image lighting

Let there be light !! ambient off course

okay getting there !!!

fog teapot using OpenVBD. Hopefully I get better result in time