Yo! Thanks. It's a cool render, bro! The only problem is that if you make the floor bigger it will block the light. See the file. I still can't figure out how to fight that...
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Play the anim till bar 4. Normally, the spot light which is behind the cube should make the horizon behind it invisible (i.e. obscure it). Here, the light behind the cube becomes invisible and the horizon line looks through. That's because the renderpass of our crashzoom is set to -1 which is less than that of the floor (0)...