@Abigail-Hookham I think this is a fun scene. A couple of things possibly to consider for sunset lighting in this setup:
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I wonder if it might be more effective to either change the perspective between the buildings, increase the distance between the buildings, or possibly show a facing view of two floors high, with one character on each floor talking over the string and cans? The reason I say that is that it could be difficult to design signifcant direct lighting from a low angle sunset reaching between what appears to be two similar height buildings, so close together. Of course you can suspend the physics of lighting for effect.
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The other major thing I see is the color temperature and shadow design. Much of the colors in the "lit" window seem to lean more cool to neutral, and largely low value contrast. I wonder if you moved to warmer color temps to simulate more of a rich golden hour effect, along with a bit more shadow contrast from lower angle of sunset, that it would create more of a feeling of a sunset?