Easiest way to define a camera trajectory?

[saadam1n]

This is more of a general question than anything else, but what is the easiest way to define a camera trajectory? I am collecting a bunch of 1 spp images for a temporal denoising dataset and I would like to have the camera follow a pre-defined path. I am aware that I can use multiple sensors for this (https://mitsuba.readthedocs.io/en/stable/src/rendering/multi_view_rendering.html) with a different sensor for each frame but I am not sure how to generate the positions for my sensors. Are there some tools I could use to make trajectory generation easy and make sure the trajectories do not pass through the walls of my scene? Alternatively, is there already a Mitsuba compatible dataset of scenes that have camera trajectories?

[merlinND]

Hello @saadam1n,

One idea that comes to mind is to write a small Blender plugin to help author and visualize the camera trajectories, and then export them as CSVs to be imported by your rendering script.
Authoring the camera trajectories in Blender could help you make sure that they match your requirements before spending time rendering them.

[ziyi-zhang]

Just to add that here is a blender add-on that reads Mitsuba XMLs.
About rendering, multiple sensors should work. Alternatively you can have one camera and update its to_world in every iteration.