Using Integrator "volpath":
> time rs_pbrt -i f15-4a_no_exrs.pbrt
pbrt version 0.5.3 [Detected 8 cores]
Copyright (c) 2016-2019 Jan Douglas Bert Walter.
Rust code based on C++ code by Matt Pharr, Greg Humphreys, and Wenzel Jakob.
Integrator "volpath"
"integer maxdepth" [1]
Sampler "02sequence"
"integer pixelsamples" [2048]
Film "image"
"string filename" ["f15-4a.exr"]
"integer yresolution" [900]
"integer xresolution" [900]
"float cropwindow" [ 0 0.9 0 0.8 ]
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/cloud/geometry/density_render.70.pbrt"
...
1h02m
> time ~/git/github/rs_pbrt/target/release/examples/rs_pbrt -i f15-4b_no_exrs.pbrt
pbrt version 0.5.3 [Detected 8 cores]
Copyright (c) 2016-2019 Jan Douglas Bert Walter.
Rust code based on C++ code by Matt Pharr, Greg Humphreys, and Wenzel Jakob.
Integrator "volpath"
"integer maxdepth" [3]
Sampler "02sequence"
"integer pixelsamples" [2048]
Film "image"
"string filename" ["f15-4b.exr"]
"integer yresolution" [900]
"integer xresolution" [900]
"float cropwindow" [ 0 0.9 0 0.8 ]
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/cloud/geometry/density_render.70.pbrt"
...
1h20m
> time ~/git/github/rs_pbrt/target/release/examples/rs_pbrt -i f15-4c_no_exrs.pbrt
pbrt version 0.5.3 [Detected 8 cores]
Copyright (c) 2016-2019 Jan Douglas Bert Walter.
Rust code based on C++ code by Matt Pharr, Greg Humphreys, and Wenzel Jakob.
Integrator "volpath"
"integer maxdepth" [20]
Sampler "02sequence"
"integer pixelsamples" [1024]
Film "image"
"string filename" ["f15-4c.exr"]
"integer yresolution" [900]
"integer xresolution" [900]
"float cropwindow" [ 0 0.9 0 0.8 ]
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/cloud/geometry/density_render.70.pbrt"
...
59m