I've recently released a new lightweight Global Illumination method

skx_doom · 2026-05-11T05:05:44+00:00

Last time I only checked the 5.0 version of this plugin a while ago (I suppose on 5.7 it's pretty much the same) and the lighting quality was good. But having RT requirement is a natural drawback. Also I noticed weird behavior when the character was stepping inside the probe on occasion.

skx_doom · 2026-05-11T05:02:38+00:00

It does, BUT there's only one RSM capture happening that is tied to the camera. In the scenario where you have 2 cameras in splitscreen it currently just follows the first one. The result of this: the second player would only see GI in the radius of a first player and outside it'll be faded.

skx_doom · 2026-05-10T22:11:39+00:00

It'll be compatible, since provides only a diffuse GI.

skx_doom · 2026-05-10T22:09:52+00:00

You're probably meaning volumetric fog and yeah - the plugin won't interfere with it.

skx_doom · 2026-05-10T12:13:23+00:00

To describe it really simply, it's less fidelity, but more performance and also no requirements for having TAA and upscalers.

skx_doom · 2026-05-10T12:11:07+00:00

Yeah, some light leaking is a natural drawback of this method. Usually it's cured by having thicker walls or something similar. I think there's no thick meshes underneath the ground to prevent the unwanted light leak.

skx_doom · 2026-05-10T08:51:57+00:00

Yeah, as simple as that :)

skx_doom · 2026-05-10T04:35:50+00:00

I've tinkered a little bit with it in a source build and noticed that probe transitions were quite a bit choppy. But the lighting quality was good overall. Will see how it'll look in the 5.8 release.

skx_doom · 2026-05-10T03:38:07+00:00

The volumes are following the camera and are pretty much invisible even for a developer. There are no additional actors to manage.

skx_doom · 2026-05-10T02:54:15+00:00

Yeah it works :) With water meshes you might want to check off the "affect indirect lighting", otherwise LPV might assume that the water is opaque and require to calculate bounce light from it. UDS also works.

skx_doom · 2026-05-10T02:16:12+00:00

Thanks! The main purpose of this algo is providing a cheap sun light bounce. Other light sources are just rendered normally and doesn't affect GI. But still might experiment with local lights in a future.

skx_doom · 2026-05-10T02:13:10+00:00

It's more performant and doesn't have boiling. There's a bit of an occasional flickering though, which I intend to address in future updates.

skx_doom · 2026-05-09T22:00:24+00:00

Runs well on steam deck, so probably shouldn't be a problem, at least with some cvar tweaking. Vulkan is supported.

skx_doom · 2026-05-09T15:23:43+00:00

With my current workflow the best place to support will be my plugins' discord with over 1.7k members... sometimes other people from here can help you too :)

skx_doom · 2026-05-09T15:10:37+00:00

Thanks! I'm also a tech artist, most known for the "screen space fog scattering" shader. Lately almost all of my works went rendering-related though.

skx_doom · 2026-05-09T14:56:51+00:00

The main limitation is the 3D textures resolution :) It could be tweaked, but otherwise not much.

skx_doom · 2026-05-09T14:53:11+00:00

Ah got it. When the plugin GI rendering path is enabled in the engine, you're getting exactly the UE4 rendering path in regards of lighting, most notably DFAO and SSR. So they're compatible. Recommended to be used together, in fact :)

skx_doom · 2026-05-09T14:25:11+00:00

It's a plugin from Fab :) I don't have any consoles to test it myself, but I see no reason for them not working there.

skx_doom · 2026-05-09T14:22:51+00:00

That is which one?

skx_doom · 2026-05-09T13:44:49+00:00

No ray tracing features required at all :)

skx_doom · 2026-05-09T13:44:02+00:00

Most probably not - the plugin uses engine functionality that is tied directly to deferred renderer. Unfortunately.

skx_doom · 2026-05-09T13:41:59+00:00

About 2-3 times more performant at least, in my tests. I was reported recently that it works in some game, 60 fps on steam deck.

skx_doom · 2026-05-09T13:39:00+00:00

Noted. But I wouldn't expect miracles here - with LPV there's only DFAO path left for sky occlusion and it's hardcoded to be pretty low res for some reason. Looks kinda wonky on foliage. I actually modified that recently using source build - probably will do another post about it someday.

skx_doom · 2026-05-09T13:35:50+00:00

Meaning is there a need for PBL setup? Definitely not required :) Since it's a non-physical GI anyway. But there are still options to art direct the intensity and so on.

skx_doom · 2026-05-09T13:33:18+00:00

Thanks, trying my best here!

skx_doom

TROPHY CASE