Aim before you map. Turn on AIM, then physically move, zoom and focus the projector until that rectangle covers your object as tightly as it will go. Every pixel outside the object is wasted light.
Trace
Fade
Photograph the lit object from beside the projector, load it here, then trace its corners. The underlay is wireframe-only — it never reaches the projector in LIVE.
KEY·STONE
Projection mapping desk
This screen is the projector frame. What you see here is what lands on the wall, pixel for pixel.
Drag the cyan corners — they're projected onto your object, so you're drawing on the real thing at real scale.
The pad handles the last few pixels. Drag it anywhere it isn't in your way.
LIVE hides every control for a clean frame. Tap the bottom-right corner to bring them back.
Aim the projector before you map. Turn on AIM, move and zoom until the lit rectangle hugs your object, and you'll be mapping with every pixel you paid for.