shade
fun shade(padded: ElevationTile, width: Int, height: Int, maxShadowAlpha: Float): FloatArray(source)
Shadow alpha per output pixel, 0f (no shading) to 1f (full shadow), row-major, width×height.
Shadow alpha per output pixel, 0f (no shading) to 1f (full shadow), row-major, width×height.