I am trying to figure out how to draw a shadow from a spherical object onto a non-flat surface. How would I draw the distortion of the shadow onto the surface?
Answer
Use a grid system. Draw the circular shadow on a flat non-distorted grid.
Draw the distorted grid, and use the flat grid as a guide, noting where the shadow intersects with the grid lines.
For example:
Attribution
Source : Link , Question Author : Françis C.N , Answer Author : Billy Kerr