Ray tracing - huge flickering. What is the problem? (VIDEO attached)

Development Rendering
15

Same issue, but with HDRI map on Skylight. It works fine for a while, but then starts flickering. Additional settings that cause this:

  • Cast Shadows = True (on SkyLight either Stationary or Movable)
  • Cast Ray Tracing Shadows = True (on SkyLight either Stationary or Movable)

Ray Tracing Global Illumination (on PostProcess)

  • Type = Brute Force
  • Max. Bounces >= 1