See-through painting

The eraser has two modes. One rubs paint back to a color. The other one cuts holes. Real see-through holes, straight through the model. That second mode is how you make leaves, fences, lace, and window panes without growing a single extra face.

1. Open Paint on a flat part

Stamp a thin flat piece, or pick one on a flatling you already have: a big leaf shape, a fence panel, a window. Brush its faces and tap the Paint brush to open the pixel canvas.

2. Switch the eraser to See-through

Tap the Eraser to pick it up, then tap it again for its pop-out. It has two modes: erase to the face’s color, or See-through. Pick See-through and choose a brush size. Now the eraser is a hole punch.

3. Cut a leaf

Draw the holes, don’t draw the thing. On a leaf, cut notches in from the edges so the outline goes jagged and leafy. On a fence, cut the gaps between the boards. On a window, cut the panes and leave the cross in the middle. The pixels you erase become real cutouts in the model, and the checkerboard on the canvas shows exactly where the world will show through.

Went too far? ↩ Undo takes the whole stroke back, and painting over a hole fills it in again.

4. Watch the light come through

Press ✔ Done and spin the model. The holes are honest geometry now: you can see the sky through the fence and the wall through the window. Tap Preview and let it perform. Cutouts read best when something moves behind them.

5. Export keeps the holes

The holes are part of the model, so they travel. Export the .glb and the see-through parts stay see-through in game engines, dioramas, and photo shoots. A flat square with good holes reads as lace from three feet away.

One thin box plus the see-through eraser is a whole prop shop: fences, railings, leaves, ferns, snowflakes, spiderwebs. Cut first, color after.