mitransient is a light transport simulation tool that extends Mitsuba 3 with support for time-resolved simulations. In essence, mitransient extends conventional rendering by adding a temporal dimension which accounts for the time of flight of light. This allows rapid prototyping of novel transient imaging systems without the need of costly or difficult-to-operate hardware. Our code is trivially easy to install through pip, and consists of Python modules that can run both in CPU and GPU by leveraging the JIT capabilities of Mitsuba 3. It provides physically-based simulations of complex phenomena, including a wide variety of realistic materials and participating media such as fog or smoke. In addition, we extend Mitsuba 3's functionality to support time-resolved polarization tracking of light and transient differentiable rendering. Finally, we also include tools that simplify the use of our simulations for non-line-of-sight imaging, enabling realistic scene setups with capture noise to be simulated in just seconds of minutes. Altogether, we hope that mitransient will support the research community in developing novel algorithms for transient imaging.

翻译：mitransient 是一款光传输模拟工具，它在 Mitsuba 3 的基础上扩展了时间分辨模拟功能。本质上，mitransient 通过增加一个时间维度来扩展传统渲染，该维度考虑了光的飞行时间。这使得无需昂贵或难以操作的硬件即可快速原型化新型瞬态成像系统。我们的代码可通过 pip 轻松安装，包含利用 Mitsuba 3 即时编译（JIT）能力、可在 CPU 和 GPU 上运行的 Python 模块。它提供了复杂现象的物理模拟，包括多种真实感材质以及雾或烟雾等参与性介质。此外，我们扩展了 Mitsuba 3 的功能，以支持光的时间分辨偏振跟踪和瞬态可微渲染。最后，我们还提供了简化模拟用于非视距成像的工具，使得包含采集噪声的真实感场景设置能在数秒至数分钟内完成模拟。总之，我们希望 mitransient 能够支持研究社区开发用于瞬态成像的新型算法。