Ability to freeze camera textures

[JPL]

I'd like to use TexMan.SetCameraToTexture to create a "still photo" of another location in the level I can draw to the HUD, but that location + camera has animating textures and possibly monsters moving past, which obviously breaks the illusion of a still photo. In my case it's not an option to simply pre-author the texture based on a screenshot because the camera location is dynamically chosen.

As a hack I tried setting the texture's camera to NULL a frame or two after setting it to the camera but that turned the texture black, which seems sensible enough even if it's not what I wanted.

I wouldn't expect the initial state of the texture to persist with savegames or anything. I just want to be able to stop the texture from updating. Maybe something like TexMan.SetCameraTextureUpdate(bool shouldUpdate).