One way to increase realism is to add imperfections. The grass, the sidewalks, the roads - no need to be perfect. Add dirt, shadows, aging, and so on.
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Something like this is true
Realistic textures, decals.
Good sun color and intensity. Ambient light color, intensity. Hemisphere light.
Postprocess: Unreal bloom, ambient occlusion
scene.environment=hdrTexture;
Material map: normalMap, aoMap, metalnessMap, roughnessMap.
Material values: envMapIntensity, normalScale, metalness, roughness.
Maybe baked HDR lightMap, but will be heavy files.
Thanks, I feel like you’re right, any reference cases?
some cheap tricks: make sure you have antialising enabled.. (the image looks non antialised).. Maybe add some post process like bloom/vignette/ssao.