Adding puddles, grunge, scratches through reflections

Enscape Host Applications Enscape for Revit
1

I’ve seen a couple youtubes to do this, both based on Sketchup as base 3D software. I use Revit and cannot replicate. Anyone know if it’s the software or me?

Thx,

Geof Narlee

2

Here’s a technique that may help. https://www.linkedin.com/pulse/i-think-its-gonna-rain-today-phil-read/