This shroud fits comfortably around a Ring Indoor Cam (2nd gen) to block room light when placed against a window. Use it to enhance night vision when it's dark outside. Make sure to turn the IR lights off (since your camera is against a window).
Printing instructions
Print the .stl file as-oriented.
A brim might help.
Installation instructions
Remove the power cord from the camera.
Slide the shroud onto the camera, from the back.
Plug the power cord into the camera.
Notes
I designed this model in OpenSCAD and it's fully parameterized. If you'd like a simple modification for another purpose (e.g., size of the shroud), send me some measurements and I'll see what I can do.