Decided to teach myself some Substance Designer and expanding from Substance Academy's "CREATING YOUR FIRST SUBSTANCE MATERIAL" tutorial, made a mini environment just to push it a little further. All rendered in Marmoset Toolbag.
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For the rain effect:
- Custom flipbook animation shader for Toolbag: https://marmoset.co/toolbag/add-ons/
- Flipbook ripple texture: https://opengameart.org/content/seamless-animated-raindrop-ripples-texture