… for sampling emission of medium

…mitter

…d added appropriate python interfaces/documentation.

…ibute.

…nd cylinder, and rejection-based sampling to mesh-based shapes

…d sampling routines and added appropriate tests to check the uniformity of the 3d sampling.

… volume sampling. Modified every dependency accordingly and added a flag to signal when the third sample is used. Updated all tests to correctly account for the use of Point3f over Point2f.

… both shapes and volumelights.

…implemented tests.

…olumetric integrators

…ded more tests for volumelight.cpp

…last_scatter_event assignment

…`cuda_*` modes and removed TODO as it's technically implemented

…ed flags to volpath for disentangling emitter and unidirectional sampling

…g with analytic sphere shape, needs mesh shape to be fixed

…ers, needs further testing

…e emitters, needs further testing

…ed up volumetric integrators

… 2d for volume sampling. Modified every dependency accordingly and added a flag to signal when the third sample is used. Updated all tests to correctly account for the use of Point3f over Point2f.

…roperty for sampling emission of medium

…phere and cylinder, and rejection-based sampling to mesh-based shapes

…ters and added appropriate python interfaces/documentation.

…cases in test_ad_integrators.py

TODO: Revert back to mitsuba3/mitsuba-data when merged

… on the git test runner.

… differentiation to prbvolpath.py - probably needs further testing. Optimized volpath.cpp for better ray coherence by looping through the medium traversal for all lanes.

…rd-mode differentiation to prbvolpath.py - probably needs further testing. Optimized volpath.cpp for better ray coherence by looping through the medium traversal for all lanes.

…ium looping as it is slower to render in many cases.

… to failing test.