I will definately be looking into atleast 6 x 4' by 3' 6" traps.
Was also thinking of mounting one at an angle above/behind my mixing desk. Also on the back wall.
To sort out the other corners, would small 1ft triangular totally filled and fixed units be better than building some 2ft x 4ft panels and mounting them at an angle from the ceiling?
The main problem with this room is that it is not just my studio, i also have a lot of vinyl tucked away in the one gap bottom right side of the plan.
Would it be worth building freestanding 4" or 6" thick panels at about 5ft to sit behind my mix position?
Here is an update pic of my room. As i mentioned, this is not to scale but is as close to proportions as i could muster with my crap paint skills lol.
I was thinking of putting 2 4ftx3ft 6" panels on the next door wall, with 2 smaller 2ftx4ft 4" panels at an angle to cover the ceiling corner.
The same thing on the hallway wall and some 2ftx4ft 4" to cover the ceiling above the window.