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Max Liani

@maxliani • 14,636 subscribers

Raytracing Director at Nvidia. Previously: Tech Lead for RenderMan at Pixar, Architect of Glimpse Renderer at Animal Logic 🇮🇹🇦🇺🇺🇸🇨🇦 Views are my own.

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DLSS in workbench. The quality of 1spp rendering is way higher compared to the other built-in denoisers, and for half the cost. The comparison changes at higher spps.

DLSS in workbench. The quality of 1spp rendering is way higher compared to the other built-in denoisers, and for half the cost. The comparison changes at higher spps.

48,257 views • 2 months ago

I am at the 4th iteration on the pixel inspector and light path debugging tool. Eventually I moved the path collection to the GPU, so I don't have to toggle between CPU and GPU rendering, making the visualization fully interactive.

I am at the 4th iteration on the pixel inspector and light path debugging tool. Eventually I moved the path collection to the GPU, so I don't have to toggle between CPU and GPU rendering, making the visualization fully interactive.

83,377 views • 2 years ago

How many indirect bounces? 0, 1, 2... 1000?

How many indirect bounces? 0, 1, 2... 1000?

70,581 views • 2 years ago

Shades of gray in the shadow penumbra aren't always appealing: a tinge of red or blue can help express warmth or cold and help convey the emotion in a shot. A light control to produce color fringes without having to paint emission textures can be useful.

Shades of gray in the shadow penumbra aren't always appealing: a tinge of red or blue can help express warmth or cold and help convey the emotion in a shot. A light control to produce color fringes without having to paint emission textures can be useful.

60,159 views • 2 years ago

Visualizing light paths differentials (actually, ray footprint / spread in this case). These are used in path tracing to compute texture filtering, among other things... and are too easy to botch in corner cases, resulting in bugs and performance issues that are hard to pin back to the cause. Here I play with specular roughness of two parallel mirrors (the closest of which is made invisible to camera rays) to see how that affects the propagation of the light path footprint. I think it's pretty cool to see.

Visualizing light paths differentials (actually, ray footprint / spread in this case). These are used in path tracing to compute texture filtering, among other things... and are too easy to botch in corner cases, resulting in bugs and performance issues that are hard to pin back to the cause. Here I play with specular roughness of two parallel mirrors (the closest of which is made invisible to camera rays) to see how that affects the propagation of the light path footprint. I think it's pretty cool to see.

39,074 views • 1 year ago

Finally, I came around at implementing DOF and wiring it to the camera manipulator system. Click and drag to samples the scene to estimate the focus distance, while scroll to modulate the aperture.

Finally, I came around at implementing DOF and wiring it to the camera manipulator system. Click and drag to samples the scene to estimate the focus distance, while scroll to modulate the aperture.

10,897 views • 3 months ago

Some progress: the grid, selection, wireframe, light gizmos, reverse Z-buffer, path-tracer/raster compositing and a few more bits. It's all coming back together.

Some progress: the grid, selection, wireframe, light gizmos, reverse Z-buffer, path-tracer/raster compositing and a few more bits. It's all coming back together.

22,576 views • 1 year ago

Adding labels so that they won't overlap to diagrams must be some form of art in its own. Now, I must sit in a corner and repeat to myself, "I won't go down that rabbit hole..." "I won't go down that rabbit hole..." "I won't go down that rabbit hole..."

Adding labels so that they won't overlap to diagrams must be some form of art in its own. Now, I must sit in a corner and repeat to myself, "I won't go down that rabbit hole..." "I won't go down that rabbit hole..." "I won't go down that rabbit hole..."

22,172 views • 1 year ago

The Vulkan porting is complete 🎉 The last missing piece was the primordial raster renderer, which I am not sure why I keep around :) All in all, it wasn't nearly as hard as I thought it would be.

The Vulkan porting is complete 🎉 The last missing piece was the primordial raster renderer, which I am not sure why I keep around :) All in all, it wasn't nearly as hard as I thought it would be.

14,699 views • 1 year ago

Second round on the ring light. It now has a hole in the middle 😉.

Second round on the ring light. It now has a hole in the middle 😉.

25,751 views • 2 years ago

To me, native visualization tools are key for a speedy development cycle! By native I mean "inside the application". For example, this is the importance sampling visualization for the light controls I posted yesterday:

To me, native visualization tools are key for a speedy development cycle! By native I mean "inside the application". For example, this is the importance sampling visualization for the light controls I posted yesterday:

19,167 views • 2 years ago

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