sRGB brush colour, components in [0, 1].
OptionalfalloffFalloff exponent applied to the radial weight (1 - r/radius).
0 — hard-edged disc (every pixel inside the radius gets
full opacity).1 — linear falloff to zero at the edge.>1 — softer, with most of the weight near the centre.
Default 1.OptionalopacityBrush alpha at the centre, [0, 1]. Default 1.
OptionalradiusBrush radius in texels. Default 4.
SceneMesh whose heat-map texture should be updated.
World-space 3D point. Length-3 array of (x, y, z).
OptionalworldOverride world-up axis. Defaults to the SceneModel's
coordinateSystem.worldUp — which must match what the painter
used, otherwise the projection axes won't agree and the brush
will land in the wrong place. Use this only if you painted with
an explicit worldUp override.
Parameters for paintHeatMapPoint.