Import your own roughness/gloss maps (using Standard Material mode) – it beats any preset.

To build a realistic atmosphere, you must layer effects in a specific order. You can save and download your own custom styles to reuse across projects.

Use High or Ultra (256–512 samples) with 6–8 light bounces.

Avoid the extremes. Real surfaces are never 100% flat or 100% reflective. For concrete, aim for 80–90% roughness; for polished marble, try 10–20%.

: Use HDRI-quality Real Skies to set the environmental mood. Rotate the sky to ensure shadows highlight your building's form.

(Lumion Effect) files or manually configure the "Realistic" style preset

host high-quality interior and exterior presets, some of which are available for free or as "pay-what-you-want" downloads. Lumion Community official Lumion Community forum