Lionel Lemarié
@hikey.org
250 followers 420 following 230 posts
Rendering, ray tracing, Metal API.
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hikey.org
Zorah looks like a nice level-up if you've conquered the classic Swallowing the Elephant challenge!
(pharr.org/matt/blog/20...)
Reposted by Lionel Lemarié
pjbomb2.bsky.social
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
hikey.org
Yes, I have plenty of ideas on how to progress, but I've had to take a break from screens for a few weeks so it will be a while before I get back to it properly.
hikey.org
Great rainbow effect! It worked really well. 😀
You made it look deceptively easy to achieve, but my own attempt wasn't nearly as successful. 😬
Awesome job.
Reposted by Lionel Lemarié
sebastianlague.bsky.social
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?...
Coding Adventure: Ray-Traced Glass and Caustics
YouTube video by Sebastian Lague
youtu.be
Reposted by Lionel Lemarié
nelarius.bsky.social
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 ✨
hikey.org
I am not related to the project so I'm not in a better position than you to approve it (:
hikey.org
Awesome! Super job.
hikey.org
It's so close to perfect!
Model is normal issues in the vents. After clean up with Auto-Flip Faces, only a few normals remain inverted.
hikey.org
Amazing! I tried it and it works great in my early tests!

Here's a model that it struggles to clean up: On the pico-mac-nano GitHub page, in 3D_model, pmn_rear_3_3.stl. It's the back of a Mac Plus case and the normals in the vents are inverted. Applying the magic flip fixes most but not all of them
hikey.org
Isn't hunger progressing backwards?
hikey.org
Yeah, it wasn't for fun - but this isn't really the forum to discuss my medical history...
I did get some good data out of it, so there's still some fun in it (:
hikey.org
Just png. All b&w individual images, very easy to parse (but a pain to download due to obfuscated scripts on the site).
The trick is finding a good way to display the dense volume. Still looking for good options.
hikey.org
Got an MRI so I played with some renders of the inside of my melon.
#metalrt #rendering
hikey.org
So. I'm really worried that you are absolutely right...
I can't get the inside of the rainbow to look right and there is a strong chance that it is because it is the effect of interference.
Without constructive and destructive interference, I can get some of it but not the full rainbow effect...
hikey.org
This is super cool!

I tried SDF displacement on triangle geometry recently. Looks like this would be a huge improvement on it.

bsky.app/profile/hike...
hikey.org
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.
hikey.org
Thanks for the great recommendation! I got one and it was amazing (:
hikey.org
Glass fractals.