Are you talking about wlr-randr? Because its --transform argument only accepts normal|90|180|270|flipped|flipped-90|flipped-180|flipped-270, not any transformation matrix. Maybe its just a limitation of the command line tool and it could be modified, I don’t know, I haven’t been too deep in the code or the protocol specifications. It also looks like it only works with wlroots based compositor.

It looks great. I really hope soon to start recommending Matrix and using it with people who aren’t necessarily technical, instead of Whatsapp, Discord or even Signal. I’m looking forward to the multi account feature too.