Constant MAX_SHAPE_VERTICES 

pub const MAX_SHAPE_VERTICES: usize = _; // 98_304usize

The most vertices the filled-shape buffer holds.

Four shapes at MilkDrop’s own limits — 1 024 instances of a 100-sided polygon each — would be 1.2 M triangles, which is not a picture. This is the bound that keeps the buffer a fixed allocation: past it the extra triangles are dropped, which degrades a preset that asks for more rather than letting it grow a buffer on the render thread.