Procedural Content Generation Issues in a Backrooms Game Development

I’m trying to use procedural content generation (PCG) to create a Backrooms game. I believe everything should be functioning correctly, but when I attempt to generate content, it either ends up being too tightly packed together, or nothing appears at all. The value that seems to affect whether things are too clumped or not is the one in red in the second screenshot. I’ve tried adjusting all of them to both very high and very low values, either individually or on all of the surface sampler nodes, but nothing seems to be effective. Does anyone have any suggestions?