How do I make the sun lamp cast cloud shadows?

I am doing a bird’s eye view of my scene. I don’t know how to make the sun lamp cast cloud shadows.

Just add a clouds texture to the lamp. That will vary the light intensity of the lamp. You can use images as well as procedural. These are often called ‘gobos’.

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So it was just that simple by the way.

Also, and in addition to the above, look at “shadow-only spotlights” which generate shadows but not light. If you need a sun-lamp to “cast a shadow,” use a shadow-only spot to generate an appropriate shadow pass.

It’s a good idea to treat “shadows” as a form of “light.” A shadowless lamp is cheap and fast; shadows are what takes the time. And, shadows in a scene usually need to be simplified for maximum impact. Whereas a real-world photographer has to monkey-around with the lights to subdue the unwanted shadows, you can “magically” produce a base scene with no shadows at all, then inject the shadows that you want into it, and finally, fine-tune the blending of the shadow-data into the finished picture. (Modulating it with a cloud-texture, for instance …)

"CG: the Perfect Digital Darkroom.
What I just described is a technique that cannot exist in the real world. But, the good news is, this isn’t the real world! :slight_smile: