scene:drop
(scene:drop v &rest solids)
Removes solids from the viewer and releases the GPU buffers they kept in geom:user-data. Answers the last one, which is still a perfectly good model. It takes the shape scene:add takes -- a solid or a LIST of solids per argument, spliced -- so what went in as one argument comes back out as one argument. scene:clear names no solid at all and needs no equivalent. Part of the scene package, a 3-D viewer for geom solids written in rontolisp over metal and appkit and loaded on first use: macOS (java -jar, the rontolisp binary, or a compiled .class / .jar; never a .wasm), with a display. See the solid modeling guide.
CL-USER> (scene:drop *v* *hand*)
#<GEOM:SOLID 8 vertices 6 facets>