/**
 * TODO For this specific use-case with octahedral impostors we can get away tracing a circular shape in general.
 *      A circle is a lot easier to quantize (as long as we make sure we place edges outside of the circle)
 * @param {ImpostorDescription} impostor
 * @param {THREE.WebGLRenderer} renderer
 * @param {number} vertex_limit how many vertices to use for the billboard, more vertices will provide better fit and lower area reducing overdraw at the cost of extra triangles. Prefer values between 4 and 16
 * @returns {Float32Array}
 */
export function build_cutout_from_atlas_by_alpha({ impostor, renderer, vertex_limit }: ImpostorDescription): Float32Array;
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