conditioning set area can't be used in all cases

[erosDiffusion]

as a user
I would like to use the outputs
with set area

however there are 3 issues:

• x,y,w,h need from transforms output to be integers (precision is limited) / movement might need to be constrained to int (no floats)
• as the canvas is bigger so the location of the assets can be outside the rendering area but needs to be inside (no negative location and assets are alloewed and would need to be cropped - it's a little harder)
• the integer value need to be in steps of 8 ... ?

[erosDiffusion]

point 1 is addressed in v3.1.0 #61