Mr Zyanide

Ray marching is a common approach to GPU-accelerated volume rendering, but gives biased transmittance estimates. My new @SIGGRAPHAsia paper (+code) proposes an amazingly simple formula to eliminate this bias almost completely without using more samples. momentsingraphics.de/SiggraphAsia20…

Complete! The ZSNES creator interview runs > 90 minutes & is full of some very interesting conversation, including how to pronounce ZSNES, the idea behind the snow, the lead programmer's favorite video games of all time, and so much more! Wednesday, 10.22.25, 8:00PM Eastern. 👇

You can now watch Chris Wyman's keynote "ReSTIR: Traveling the Path of Reuse" youtu.be/MRg91ZB1wU8 #I3D2025

@max_tarpini Awesome! Thanks 😊

@MZyanide Coincidently I had to do some bump mapping for a thing I'm doing so here it is.

Want your BRDF to be environmentally friendly? Here's a terrible option to keep semi-metals energy conserving zyanidelab.com/semi-metallic-…

@BenSimsTech I'm a little bit concerned about blind spots (wrong math, wrong implementation, etc). That's an interesting approach, if I understand correctly you have 3 lobes, 2 specular and 1 diffuse.

@MZyanide Seems like a pretty good approach, what makes this a terrible option? Any downsides? I use similar LUTs for multi scatter GGX specular and diffuse, didn't realize they lost so much energy with semiconductors though. Approach I use is section 6.12 here: dassaultsystemes-technology.github.io/EnterprisePBRS…

@chena_cpp Sure, whatever color you have defined for your material, use that in your diffuse lobe, no need to multiply it by (1-metalness) since the scaling is done by (1-Espec)

@MZyanide diffuse_reflectance = base_color? Didn't get it, could you explain more? Thanks.

@max_tarpini Bump mapping! I thought there was a test I was missing or something, like something in addition to white furnace. Now, for microfacet normal mapping you mean this paper? jo.dreggn.org/home/2017_norm… I'm definitely checking it out, thanks for pointing it out.

@MZyanide :) also called normal mapping. And there's a cure! Called microfacet normal mapping.

@max_tarpini Ohh noes. I'll give it a look.

@MZyanide It's that thing invented by J. Blinn that will perturb your geo normals breaking symmetry in your path tracer while sucking energy from your materials after you thought you had that fixed ;)

@max_tarpini Thanks! Bump? I don't know what that is :(

@MZyanide Nice. Did you try with bump?

@Traductus Thanks! Well, project is moving, actually this last article was directly motivated by it, I'm rewriting the BRDF.

@MZyanide Amazing work, please don't stop doing it! Coming to your website and today it was very interesting to read. What is the overall progress on RTXing the JO?

@Pjbomb2 @ssh4net Haha, not a good present tho

@MZyanide @ssh4net A new Zyanides Lab post?? Must be an early Christmas present!

@createthematrix Cool! Just followed you

Oh hey.. just joined the blue butterfly gang under createthematrix. Who’s all there?

@dcominottim @BattleAxeVR Used this one: bsky.app/starter-pack/g…

@MZyanide @BattleAxeVR Got a bsky List?

Slowly losing follower count...I wonder, are more and more people disactivating their X accounts near the election? Is it bots getting blocked / removed? Or is it just me? :) Not really interested in making this account public again, at least not while gamedev is on hiatus.

It's getting to that point where our research team is thinking about next year's interns. If interested, feel free to e-mail me, or (even better) find someone on our team whose research aligns with yours and e-mail them. research.nvidia.com/labs/rtr/

@SebAaltonen And there are those cosplaying as google with all their microservices that think a 500ms response is fine.

200ms is fast for web programmers. Meanwhile game programmers have to target the latest 240Hz screens. That's 4.16ms to simulate and render the whole game world (can contain million objects). Any operation that takes 1ms+ is considered an expensive operation in real time apps.

Remember I said I have a bsky account? Well, I didn't know I can use my domain, so I changed it to : @mrzyanide.zyanidelab.com . Sorry about the confusion

Would anybody care about an "Introduction to Quaternions" article, or are there enough of them on the internet already? I'm thinking of deriving everything up to rotations and slerp in a beginner-friendly-but-still-precise way. (RTs for coverage appreciated)

GeForce 256? Here’s mine! The original fan got stuck back in the day and I put this one. Great memories 🥹