The points to draw, each [x, y, z].
OptionalopacityHow opaque the points are, from 0 (invisible) to 1 (solid).
OptionalsizeSize of each drawn point, in model units.
OptionalcoloursOne hex color string for all points, or one string per point.
OptionalupdatableWhen true, the drawn mesh is built so the positions can be changed later without redrawing.
OptionalpointsA mesh drawn earlier with updatable on: moved in place while the points count,
colours, opacity and size stay the same, else freed and redrawn. Use the returned mesh.
A list of points and how to draw them: their size, colors and opacity, and whether the drawn mesh will be updated later.