Hello. I have created image masks with SC2 streams in mind. Using these images one can cut out and replace certain parts of in-game screen elsewhere. These can be quite handy for vertical streams to show viewers minimap and supply count + resources for example.

https://imgur.com/a/jBBrJbp mask images.
https://obsproject.com/forum/resources/source-clone.1632/ <- Source Clone plug-in.
https://imgur.com/a/LMYoXHs <- Example of how I used the mask.


To use these images in OBS I would recommend downloading Source Clone plug-in for obs. Source clone is also quite handy for other stuff in as well.

To apply mask, make a clone of your game capture source to your sources.. Select the clone as source and go to filters and select Image Mask/Blend, mask type is Alpha Mask (Alpha Channel) and select the image you have downloaded.