Does the rectangle selector work for your usecase? https://fastplotlib.org/ver/dev/_gallery/index.html#selection-tools

I want to plot things like the gifs in the readme of this repo: https://github.com/The-OpenROAD-Project/RePlAce

I would use the RectangleSelector and make it non-responsive to events:

for wo in rectangle_selector.world_object.children:
     wo.material.pick_write = False

In the future we can make a kwarg that enables/disable selectors.

Actually you can just add images, that's what I would do.

I would use a single image, then you can choose a cmap and set the alpha values (it might be helpful to set the cmap.vmin and cmap.vmax to be between 0 and 1 so then you can just use a binary array for setting the cmap values)