Adaptive Invisible Blocks → Smooth-ish Baked Terrain (PSX-ish, untextured)
Click = Add block • Shift+Click = Remove • R reset • F freeze/unfreeze "baked" mesh
Move: WASD + Space/C • Look: mouse (click canvas to lock pointer) • Brush radius: 1..5
Idea: edit a cheap hidden voxel field (invisible adaptive blocks), then solve → mesh (Surface Nets style), then you can freeze it as a solid mesh and throw away the voxels.