Zorah looks like a nice level-up if you've conquered the classic Swallowing the Elephant challenge!
(pharr.org/matt/blog/20...)
(pharr.org/matt/blog/20...)
October 2, 2025 at 2:26 PM
Zorah looks like a nice level-up if you've conquered the classic Swallowing the Elephant challenge!
(pharr.org/matt/blog/20...)
(pharr.org/matt/blog/20...)
Reposted by Lionel Lemarié
Some images showing off my improvements to my photon mapper I have integrated into truetrace
The photon mapper is up on the Dev branch on the github
The photon mapper is up on the Dev branch on the github
September 21, 2025 at 8:29 PM
Some images showing off my improvements to my photon mapper I have integrated into truetrace
The photon mapper is up on the Dev branch on the github
The photon mapper is up on the Dev branch on the github
Reposted by Lionel Lemarié
My latest coding adventure is now up on YT -- some experiments with ray-tracing glass and water, and the cool caustics they can cause
youtu.be/wA1KVZ1eOuA?...
youtu.be/wA1KVZ1eOuA?...
Coding Adventure: Ray-Traced Glass and Caustics
YouTube video by Sebastian Lague
youtu.be
August 16, 2025 at 12:44 PM
My latest coding adventure is now up on YT -- some experiments with ray-tracing glass and water, and the cool caustics they can cause
youtu.be/wA1KVZ1eOuA?...
youtu.be/wA1KVZ1eOuA?...
Reposted by Lionel Lemarié
Experimenting with a face extrusion and retraction brush in my toy #voxel editor. Threw a bit of #raytracing in there while I was at it ✨
August 4, 2025 at 7:28 PM
Experimenting with a face extrusion and retraction brush in my toy #voxel editor. Threw a bit of #raytracing in there while I was at it ✨
July 19, 2025 at 8:21 PM
Morphing fractal shapes.
This is a Julia fractal with a linear interpolation of the distance function between iteration counts. Starts by interpolating between 1 and 3 iterations, then 3 and 5, etc...
The material also changes for no particular reason...
#metalrt #rendering #fractal
This is a Julia fractal with a linear interpolation of the distance function between iteration counts. Starts by interpolating between 1 and 3 iterations, then 3 and 5, etc...
The material also changes for no particular reason...
#metalrt #rendering #fractal
July 15, 2025 at 12:31 PM
Morphing fractal shapes.
This is a Julia fractal with a linear interpolation of the distance function between iteration counts. Starts by interpolating between 1 and 3 iterations, then 3 and 5, etc...
The material also changes for no particular reason...
#metalrt #rendering #fractal
This is a Julia fractal with a linear interpolation of the distance function between iteration counts. Starts by interpolating between 1 and 3 iterations, then 3 and 5, etc...
The material also changes for no particular reason...
#metalrt #rendering #fractal
Reposted by Lionel Lemarié
New on Metal by Example: Getting Started with Metal 4, a breezy introduction to the fundamental changes arriving in the Metal API later this year: metalbyexample.com/metal-4/
Getting Started with Metal 4
Another WWDC is in the books, and with it came a major update to many platform technologies, including Metal. Metal graduated to version number 4, and in this article, we’ll explore the core …
metalbyexample.com
July 8, 2025 at 10:46 PM
New on Metal by Example: Getting Started with Metal 4, a breezy introduction to the fundamental changes arriving in the Metal API later this year: metalbyexample.com/metal-4/
🧵 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.
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.
July 7, 2025 at 5:38 AM
🧵 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.
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.
Fractal SDF rendered as voxel spheres.
The high resolution one has close to 1 billion spheres.
#metalrt #rendering
The high resolution one has close to 1 billion spheres.
#metalrt #rendering
July 5, 2025 at 11:27 PM
Fractal SDF rendered as voxel spheres.
The high resolution one has close to 1 billion spheres.
#metalrt #rendering
The high resolution one has close to 1 billion spheres.
#metalrt #rendering
July 5, 2025 at 1:11 AM
July 5, 2025 at 1:09 AM
@jbakergraphics.bsky.social has an amazing collection of fractal distance estimators! jbaker.graphics/writings/DEC...
All the authors are listed on the page. There are some gems in there!
#metalrt #rendering
All the authors are listed on the page. There are some gems in there!
#metalrt #rendering
July 4, 2025 at 7:32 AM
@jbakergraphics.bsky.social has an amazing collection of fractal distance estimators! jbaker.graphics/writings/DEC...
All the authors are listed on the page. There are some gems in there!
#metalrt #rendering
All the authors are listed on the page. There are some gems in there!
#metalrt #rendering
July 2, 2025 at 1:12 PM
I got a pico-mac-nano! Such a cool little device. The 1.5" screen looks awesome.
When I was a kid playing on my parents' Mac Plus and read that computers could one day fit in your pocket - *this* is what I imagined it would look like.
blog.1bitrainbow.com/pico-mac-nano/
When I was a kid playing on my parents' Mac Plus and read that computers could one day fit in your pocket - *this* is what I imagined it would look like.
blog.1bitrainbow.com/pico-mac-nano/
July 2, 2025 at 12:26 AM
I got a pico-mac-nano! Such a cool little device. The 1.5" screen looks awesome.
When I was a kid playing on my parents' Mac Plus and read that computers could one day fit in your pocket - *this* is what I imagined it would look like.
blog.1bitrainbow.com/pico-mac-nano/
When I was a kid playing on my parents' Mac Plus and read that computers could one day fit in your pocket - *this* is what I imagined it would look like.
blog.1bitrainbow.com/pico-mac-nano/
Quick test of participating medium - simplest possible: on primary rays, N% chance of bouncing in a random direction at an arbitrary point between the origin and the intersection.
Not a bad result, but I'm disappointed not to see better refracted light trails under the sphere.
#metalrt #rendering
Not a bad result, but I'm disappointed not to see better refracted light trails under the sphere.
#metalrt #rendering
July 1, 2025 at 12:22 AM
Quick test of participating medium - simplest possible: on primary rays, N% chance of bouncing in a random direction at an arbitrary point between the origin and the intersection.
Not a bad result, but I'm disappointed not to see better refracted light trails under the sphere.
#metalrt #rendering
Not a bad result, but I'm disappointed not to see better refracted light trails under the sphere.
#metalrt #rendering
June 30, 2025 at 3:54 AM
Nice little palate cleanser for my mind: easy renders of a few landmarks using OSM data.
Some of these are 100M triangles. Plenty of detail in there.
#metalrt #rendering
Some of these are 100M triangles. Plenty of detail in there.
#metalrt #rendering
June 30, 2025 at 1:02 AM
Nice little palate cleanser for my mind: easy renders of a few landmarks using OSM data.
Some of these are 100M triangles. Plenty of detail in there.
#metalrt #rendering
Some of these are 100M triangles. Plenty of detail in there.
#metalrt #rendering
The photon debugging view is working pretty well now. I can navigate the scene to look at the paths, bounces and final photon positions - along with a preview of their impact on the scene.
#metalrt #rendering
#metalrt #rendering
June 28, 2025 at 6:27 PM
The photon debugging view is working pretty well now. I can navigate the scene to look at the paths, bounces and final photon positions - along with a preview of their impact on the scene.
#metalrt #rendering
#metalrt #rendering
Here's an idea: shoot some photons and add them to the scene as actual emissive spheres to illuminate it.
Couple of drawbacks: it's very slow and it's not very effective.
#metalrt #rendering
Couple of drawbacks: it's very slow and it's not very effective.
#metalrt #rendering
June 28, 2025 at 4:12 AM
Here's an idea: shoot some photons and add them to the scene as actual emissive spheres to illuminate it.
Couple of drawbacks: it's very slow and it's not very effective.
#metalrt #rendering
Couple of drawbacks: it's very slow and it's not very effective.
#metalrt #rendering
Want to do a quick photon mapping test, but it's a slow start because I spent most of the time so far playing with the debug rays instead. It does immediately show that the basic GPU hash rand I used is no good.
#metalrt #rendering
#metalrt #rendering
June 27, 2025 at 12:28 PM
Want to do a quick photon mapping test, but it's a slow start because I spent most of the time so far playing with the debug rays instead. It does immediately show that the basic GPU hash rand I used is no good.
#metalrt #rendering
#metalrt #rendering
1/15) 🧵 Breaking down a quick experiment: Simple but slow displacement for ray-traced triangles
#MetalRT #rendering
Top-left: Typical path-tracer with a simple triangle-based model.
Other three: Same model input, with increasing displacement added while tracing the rays.
#MetalRT #rendering
Top-left: Typical path-tracer with a simple triangle-based model.
Other three: Same model input, with increasing displacement added while tracing the rays.
June 24, 2025 at 3:46 AM
1/15) 🧵 Breaking down a quick experiment: Simple but slow displacement for ray-traced triangles
#MetalRT #rendering
Top-left: Typical path-tracer with a simple triangle-based model.
Other three: Same model input, with increasing displacement added while tracing the rays.
#MetalRT #rendering
Top-left: Typical path-tracer with a simple triangle-based model.
Other three: Same model input, with increasing displacement added while tracing the rays.
Quick experiment: Instead of adding each triangle to the BVH, how about adding a bbox for each one and raymarching the triangle inside? It's very very slow, but allows for some fun displacement.
June 19, 2025 at 6:00 PM
Quick experiment: Instead of adding each triangle to the BVH, how about adding a bbox for each one and raymarching the triangle inside? It's very very slow, but allows for some fun displacement.
"Self portrait" that looks nothing like me, as a test of a simple subsurface scattering implementation. I was aiming for the classic marble look, but there's plenty of room for improvement...
#metalrt #rendering
#metalrt #rendering
June 16, 2025 at 2:25 AM
"Self portrait" that looks nothing like me, as a test of a simple subsurface scattering implementation. I was aiming for the classic marble look, but there's plenty of room for improvement...
#metalrt #rendering
#metalrt #rendering
June 14, 2025 at 2:19 AM
June 13, 2025 at 7:16 PM