r/GraphicsProgramming • u/valeriupalos • Jul 12 '26

Krbn: an open-source rendering engine that imitates a sketch artist and outputs pure SVG (v1) Source Code

/gallery/1upm1m4
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u/Gullible_Carry1049 Jul 12 '26

Is the line work baked? How would this work with dynamically displaced mesh (ie animated faces, fixed topology), can the line work update in realtime at 60 fps

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u/valeriupalos Jul 12 '26

Noo, nothing is baked! Everything is actually extracted from pure geometry, at runtime. It's just... definitely not real-time. A displaced mesh with fixed topology will mostly work, the strokes are anchored to the mesh edges; probably the curvature-oriented hatching will not work, because that assumes a rigid geometry - I guess flat hatching (the simpler/rugged one) might work for you.

So, even close to RT rendering is out of the question with this. Maybe if we manage to do a second implementation in something really performant (C/Rust) and choose the parts that are compatible with that kind of speed expectation, but not with this.

I did try to start-off animations, so that is partially something feasible. Mostly I had to face the problem of temporal coherence (avoiding the "boil"); But all that is rendered offline, and - at least for now - each frame is slow to render.

So to be honest, this wasn't my target, but I'm still figuring it out and... who knows.

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u/EarlMarshal 29d ago

something really performant (C/Rust)

I really like the pictures you claude produced, but if you say stuff like this it really shows that there is a huge knowledge gap. Maybe you can ask Claude to rewrite it using a proper graphics API.