Using Integrator "volpath":
> rs_pbrt -i f15-5_no_exrs.pbrt
pbrt version 0.6.1 [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.
Sampler "sobol"
"integer pixelsamples" [2048]
Integrator "volpath"
"integer maxdepth" [25]
Film "image"
"string filename" ["f15-5.exr"]
"integer xresolution" [1000]
"integer yresolution" [800]
"float scale" [2]
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/coffee-splash/materials.pbrt"
reading "bsdfs/ceramic.bsdf" returns true
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/coffee-splash/geometry.pbrt"
reading "bsdfs/ceramic.bsdf" returns true
Rendering with 8 thread(s) ...
3150 / 3150 [========================================================================] 100.00 % 0.25/s
Writing image "pbrt.png" with bounds Bounds2 { p_min: Point2 { x: 0, y: 0 }, p_max: Point2 { x: 1000, y: 800 } }