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Tickets are up! graphicsprogrammingconference.com/tickets/

Frustum Grids Primer Part 2: This time instead of having a fixed depth-slice count (which is common for games for a variety of reasons) we'll instead focus on trying to maintain a uniform and non-elongated froxel shapes, which results a variable slice count www.desmos.com/geometry/yl5...

Working on a small primer on frustum grids. The most common approach is to distribute the depth-slices in an "exponential" manner between a near and far plane, which is probably more appropriately named "geometric" since it relies on a geometric progression. www.desmos.com/geometry/qd1...

I had a student who did my university raytracing course in Odin, now they've sent me an image made by their raytracer and I'm dying

Today I was reminded of a cool fact that at first glance looks decidedly bizarre. Midpoint quadrature — split your interval into n equal subintervals, add up the (smooth!) integrand evaluated at the midpoints and multiply by the width of a subinterval — is of course only second order accurate, 🧵

Random @desmos.com doodle on frustum side-plane inside-out testing: www.desmos.com/geometry/8l6... Uses direct references to objects in the viewport (which are visually disambiguated using colors), and dynamically coloring the test point based on whether it's inside or outside the frustum

Post-Siggraph inspiration: Working out the math of frustum grids is fun

🛫➡️SIGGRAPH today. Nice and quiet in Schiphol

Simple Desmos 3D implementation of ttnghia.github.io/pdf/Quadrati...: www.desmos.com/3d/857tn8jhjl Roughly a 5 years old paper by now, but seems awfully relevant still. By a former student of @cemyuksel.com, who I believe is at Nvidia now.

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I'll be in Vancouver for Siggraph in just about two weeks. Let me know if you want to say hi or meet up. :)

Finally, I'm proud to announce that #Illugen 1.0 is available. If you need to generate assets for special effects, this is the tool for you : Spritesheets, noises, caustics, masks, meshes(including pivot baking) ... and much more to come. jangafx.com/software/ill... #realtimevfx #techart

Crown splash test in #LiquiGen. BBox of the largest splash roughly 448x448x1280 voxels, 88M particles in all cases. Initial droplet 2cm wide, hits the surface at 1, 2 3 and 4 m/s, respectively. Pool of water at bottom a 3.6cm tall cylinder of radius 11.10cm 240 Hz, 5 substeps, voxel size 0.5mm

Look, speaking as a physicist, it is hard for me to put into words how batshit crazy this is.

Spent the last week or so trying to fully understand centripetal Catmull-Rom splines. Reaching the end now. Here's a WIP interactive Desmos link: www.desmos.com/calculator/w...

🧵 Attempting to render a rainbow simply by path tracing millions of rain drops. It's not working well yet... Starting by looking closely at a drop and going through the color spectrum, we can see the diffraction at play: the refracted scene appears to move due to the changing ior.

Hardware virtual textures look like a marvelous tool for large terrains or volume compression. Alas, they are in a sad state in terms of performance and usability. And strangely, the (very bad) binding perfs varies a lot with the driver. → read here: hal.science/hal-05138369 @rcmz0.bsky.social

Notes on atmospheric perspective and distant mountains blog.runevision.com/2025/06/note... On my recent vacation in Japan, I had ample opportunities to study views with distant mountains. And something about the shades at different distances clicked for me that’s now obvious in retrospect.

If you're a coder and you look up to me in any way as a programmer, please know that I cannot respect and in fact have a very poor opinion of people who voluntarily use any kind of cloud based LLM for coding with any kind of regularity

Yet another quadratic Bezier distance function 🧵,slightly cleaner than last time Premise: We want to calculate the distance to a quadratic Bezier curve, with as little effort as possible, ideally without evaluating the full quadratic Bezier curve itself, which involves solving a cubic equation.

Pet peeve that has been peeving me a lot recently: People that make their own simplified and barebones version of a thing (very cool), then publish it (also very cool), then market it using some misleading claims about how it's 10-50x faster than the original thing (very not cool).

Last week I did a research retreat on stroke expansion yielding a cubic Bézier approximation. It went well. I wrote a summary: docs.google.com/document/d/1... That document requires a certain amount of context and background to understand fully, but hopefully some people will find it interesting.

Another 🧵 on (almost) everything (interesting) about evaluating distances and closest points to quadratic Bezier curves

Improvised a marble elevator with some lego technique and regular legos, for a lego duplos marble run we had around.

Looks like the GPC in Breda is happening again 🥳 No info or tickets yet, but I already can't wait! graphicsprogrammingconference.com

Holding SIGGRAPH Asia 2026 in Malaysia is a slap in the face to the rights of LGBTQ+ people. Especially now, when underrepresented people need as much support as we can possibly give them ! Angry like me ? Sign this open letter to let them know. 🏳️‍⚧️🏳️‍🌈 docs.google.com/document/d/1...

Graphics Programming weekly - Issue 395 - June 15th, 2025 www.jendrikillner.com/post/graphic...

What is common knowledge in your field, but shocks outsiders? (GPU) Programming/Simulations: Making something fast isn't necessarily hard, making something fast while also fulfilling various other requirements is hard, e.g. robustness, covers enough features, flexibility, time to implement, etc.

Our #SGP25 work studies a simple and effective way to uniformly sample implicit surfaces by casting rays. (1/9) “Uniform Sampling of Surfaces by Casting Rays” w/ @abhishekmadan.bsky.social @nmwsharp.bsky.social and Alec Jacobson

Sphere surface partitioning

Halvorsen attractor in Sponza. #metalrt #rendering

Halvorsen attractor. #metalrt #rendering

Glass Lorenz attractor. #metalrt #rendering

Hola again graphics peeps! 😊 I found myself with enough bits and pieces related to text rendering to warrant a write-up. So here it is! 😱 osor.io/text Spiced up with direct vector rendering, sub-pixel anti-aliasing, run-time atlas packing, temporal accumulation, and more! I hope you enjoy it! 🧡

More distance quadratic Bezier curve stuff: Nicely bounded regions Red: Closest to the curve Green: Closest to the green end point Yellow: Closest to the yellow end point The part of the yellow/green region bounded by the pink lines are easily guaranteed to be out of bounds, and can be padded more

Ever wondered how badly we're all addicted to buying new GPUs in graphics labs? Come see our talk at #SIGGRAPH2025 to discuss how we can collectively move "Towards a sustainable use of GPUs in Graphics Research" with @elie-michel.bsky.social @axelparis.bsky.social Octave Crespel and Felix Hähnlein

Do you like voxels and implicits' representations and wish you could animate them in real-time? Now you can! Check out our article: "Real-time rendering of animated meshless representations" to know how: hal.science/hal-05095359 Shout out to @pacomeluton.bsky.social for this fantastic work!

Experimenting with conservatively culling of piecewise quadratic Bezier curves in the context of spline distance fields Problem: Given a sample point (at cursor), can I guarantee that points close to this sample point (inside box) are closer to one of the curve segments, or do I need to check both?

Menger Sponza. #MetalRT #rendering

Tried to make some sort of funnel, and multiple emitters at once. Still sort of feels like it's going too fast

Some good stability and solver improvement lately for #LiquiGen's viscosity solver Here, some thick honey/molasses-like liquid in freefall played back in real time, which is why it moves so quickly The emitter is 1/4 inch wide, and placed 6 inches above the ground. Simmed at 600 Hz

🚪 "things you have to do" 🚪 "relaxation and self-care" doing either of these will nullify the other, so it's best to enter a kind of quantum limbo state where you're under constant pressure to do both, while actually doing none of them, yet feel their combined guilt looming over you

Here is a new blog post of mine, where I dive deep into the theory and math behind ReSTIR GI. Big thanks to Markus Kettunen for verifying the theory, reviewing the article, and catching a key detail I had missed. agraphicsguynotes.com/posts/unders...

High viscosity twist