Dmitry Karpukhin

@skx_doom • 7,207 subscribers

Unreal Engine Developer/Tech Artist. Made Sky Creator, SSFS, Blockout Tools and more. https://t.co/aJihpxFQkP

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Dmitry Karpukhin

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My "Light Propagation Volume" plugin for #UE5 is now featuring Cascades system! It adds much longer light bounce distances, than what could be previously seen in the UE4's LPV implementation. Still some work to do, performance-wise as well :) But it's shaping up very nicely.

I'm not an expert on Lumen, but I don't like this.

Fab Friday Mega Sale is up! All of my products are 30% off right now.

"Sky Creator" has been chosen by Epic Games into Marketplace Showcase rotation and to celebrate it I made it 30% off! In a recent video about upcoming 1.40 update I demonstrated moderate rain, but you can crank up the values even higher.

By the way I almost always disable "Screen Traces" of Lumen. But if you want more horror content, here's how it looks with car lights in a night lighting conditions. (UE5.5, Epic settings, no AA, 100% render resolution, Lumen with Screen Traces enabled)

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A quick demo with some features of Sky Creator 2.0: - Multi-Layered Volumetric Clouds (ground fog, stratus, cumulus, storm, alto and cirro layers) - Cloud-Driven Weather (affecting particles and materials) - Custom Cloud Brushes for art-direction #UE5 #techart #vfx #shaders

Rain Effects test from Sky Creator 2.0 (heavy in development) - all dynamic objects can interact with puddles with zero setup. #UE5 #vfx #techart #shaders

I've recently released the Light Propagation Volumes (custom GI plugin) for #UE5 LPV is an algorithm of resolving the diffuse light bounce from the perspective of the sun in world space (firstly introduced in 2009 by Crytek). It's non-temporal, performant and lightweight.

Proof of concept: Sky Occlusion via LPV extension. Super low res and low detail, but temporally stable. Perhaps could be used instead of DFAO... Gives more like a feeling of a shadow on a scene, than something detailed. SSAO could be still used for contact details or so 🤔

Continuing working on a "potato GI" option for #UE5 My "LPV GI" plugin just received a new update with improved visuals, bug fixing, and a huge performance optimizations!

"Screen Space Fog Scattering" is now completely compatible with unreal's Height Fog, so the blend is really nice! On/Off at the end of the video, so you can see the difference. Also used Sky Creator to quickly setup the lighting. #UE5 #gamedev #shaders #fog

So I made it look even worse (which is better). Continuing tests of found footage/VHS aesthetics in #UE5

A short demo of the upcoming new 'Multi-Layered Volumetric Clouds' feature for Sky Creator. This is still work in progress though... #UE5 #techart #shaders #clouds #vfx

I got something crazy for today - custom GI from a plugin in #UE5!! This is super rough and unoptimized sketch, but it's already faster than Lumen, though of course it's muuuch less accurate. Here I'm just imitating Large Scale AO using Global SDFs, no sun light bounces yet.

Continuing my custom GI experiments - here's a "Light Propagation Volume" prototype in #UE5 (from a plugin)! It's unoptimized right now, it has just a single volume and the reflected light looks a bit strange, but still!

That's right there is a promising start 👀

The idea with averaging several soft shadows have worked! And thanks to SDF, it's possible to have super soft long shadows! The demonstrated effect is simulating dynamic global ambient (sky) occlusion, rendered only on the GPU. Also, very temporally stable, outside of SDF lods.

Testing a silly (or genius?) idea - accumulate custom shadow maps in a buffer to make some sort of Global AO. The implementation or the sample pattern could be better of course, this is just a rough sketch. It's pretty fast too, since you can do just one scene capture per frame.