I try to add a lighting (sunlight) source in my background; I don't understand how Shadow light work. Any good tutorial on the subject? or any idea how to achieve it?
It's fairly seamless in unity 3d. But, I can imagine 2d works a little differently. When I tried a basic shadow light, it was not good lol.
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It shouldn't be too bad, I don't think. Include the light source, and then attach shadow caster behaviors to whatever you want casting a shadow. Tell you what, I'll play with it a bit tonight, and if I come up with something I'll let you know.