mitransient v1.2.0

🚀 mitransient 1.2.0 brings support for transient polarization tracking and differentiable transient rendering, along with many other cool new features!

• Differentiable transient rendering enables gradient-based optimization with transient signals (backward automatic differentiation) and forward inverse rendering (forward automatic differentiation). Check out the examples here!
• Polarization support enables tracking of Stokes vectors over time. Check out the examples here!
• Many updates to the documentation (https://mitransient.readthedocs.io), API/plugin usage and examples.
• New visualization tools for polarized videos.
• New angulararea plugin: an area light that emits in a limited angular range.

mitransient v1.1.2

Minor fixes with respect to v1.1.1:

• transient_pbrvolpath incorrectly calculated the time of flight for some paths. Now it's fixed (PR @DiegoBielsa)
• mitransient now correctly tells you if you have installed an incompatible Mitsuba 3 version and tells you how to fix it.

mitransient v1.1.1

Refactors mitransient so that it's compatible with Mitsuba 3.6.X / Dr.Jit 1.0.X. This brings a (pretty noticeable) improvement in efficiency/execution time :)

How to upgrade:

• If you installed Mitsuba with pip, you can just pip install -U mitsuba==3.6.4. If you compiled Mitsuba from source, you will need to pull and recompile.
• If you're using y-tal you will need to update to >=0.19.0 (pip install -U y-tal==0.19.0)

Notes:

• Spatial and temporal filtering of the renders have not been ported to Mitsuba 3.6.X yet.
• If you need these for your work, or if you find any other issue, feel free to contact us.

New plugins:

• New phasor_hdr_film plugin that stores phasors for a list of frequencies dictated by its wl_mean and wl_sigma parameters. For NLOS simulations, this film is designed to work with tal.reconstruct.pf_dev (see skip_H_fft and skip_H_padding).

mitransient v1.1.0

Refactors mitransient so that it's compatible with Mitsuba 3.6.X / Dr.Jit 1.0.X. This brings a (pretty noticeable) improvement in efficiency/execution time :)

How to upgrade:

• If you installed Mitsuba with pip, you can just pip install -U mitsuba==3.6.4. If you compiled Mitsuba from source, you will need to pull and recompile.
• If you're using y-tal you will need to update to >=0.19.0 (pip install -U y-tal==0.19.0)

Notes:

• Some parts have not been ported to Mitsuba 3.6.X yet. This includes spatial and temporal filtering of the renders, and the transient_prbvolpath integrator (i.e. participative media). We plan to also port these in a future update.
• If you need these for your work, or if you find any other issue, feel free to contact us.

mitransient v1.0.4

• Improved tonemapping and video generation
• transient_volpath integrator is more efficient now
• New mitr.cornell_box() function which provides a minimal scene with a time-resolved integrator, useful for demonstrations
• New mitr.vis.rainbow_visualization(...) which shows the rendered scene with a rainbow colormap that represents time of flight
• Added documentation and examples (see https://mitransient.readthedocs.io/en/latest/)

mitransient 1.0.3

First complete public version of mitransient, with updates to the documentation.

mitransient 1.0.2

First complete public version of mitransient.