I was testing this out on the corner of a building and I think a few things would help:
The ability to rotate sprites 90 degrees.
The ability to add sprites.
Suggested placement of lights via simple geometry that can be replaced in-render.
Ability to “undo” sprite movement. Command-Z
And as an FYI, I use SketchUp, Twinmotion, and Photoshop as my workflow. Here’s a SketchUp and Twinmotion screenshot to describe what I’m talking about…
It shows how to properly setup the materials to get the correct lighting. You should not add more lights, instead you should use the material’s “Glow” setting.