A circular falloff around the fade centre. Splats start dissolving at start and are gone by end. This is the workhorse for a capture that thins out evenly in all directions.
Four independent edges plus a rotation — the right tool when the capture is a strip (a coastline, a road) rather than a disc. Distances are measured from the fade centre.
Draw then click on the splat to drop points around what you want to keep. Drag a point to move it, right-click a point to delete it. Esc leaves draw mode. Max 48 points.
Bottom kills the capture's flat cut plane and the skirt of floaters hanging under the ground. Top clears haze blobs and ballooning low-detail gaussians in the sky.
Wobble breaks the boundary out of a perfect circle or straight line so it reads as the capture running out rather than as a cut. Skirt leans harder on low-lying splats near the edge — the drooping mush a drone leaves at the limit of its coverage.
Which way is up, if the manifest is wrong and the capture arrives lying on its side. Auto trusts the file.
Judge an edge against more than one background — a fade that looks clean on black can be obvious on white.
Preview cut paints what is being removed in red instead of fading it, so you can see exactly where the boundary sits. Cull hidden skips fully-faded splats entirely — a real speed-up on a capture this size, switch it off if you ever see popping. Settings save themselves in this browser; Copy config gives you the block to bake into main.js.