SEUS PTGI E5 Release! (Patreon)

SEUS PTGI E5 is here! This update isn't as big as the last, but some new features that aim to enhance your gameplay experience are here.

E4 was the first version of SEUS PTGI that I actually tried survival gameplay with, and it led to some insights. The most distracting problem for me was how long lighting takes to update, and all of the ugly artifacts that this can cause (you'll know what I'm talking about if you've broken a torch or glowstone in a cave).

So, I worked on improving and reworking the GI filtering so it could handle not relying to heavily on temporal reuse. You can adjust the GI responsiveness with a new option (Raytracing Options > GI Responsiveness). At the new default setting of 3, GI is 8x more responsive! 

This opened up a new opportunity, screen-space GI tracing, which enables anything in screen-space to cast indirect shadows and light (including mobs!). It's something I've tried before, but the low responsiveness of lighting just didn't play well with it. You can see those skeletons look much more integrated into the scene, casting nice indirect shadows!

The other most distracting thing was sunlight leaking in caves, which is worse than ever now that this light bounces around with full GI. So, I've added a fix that should cure the problem in caves with no nearby areas where sky is visible. It can cause issues with large outdoor overhanging structures, so there's an option to disable it (Raytracing Options > Sunlight Leak Fix).

I'm also experimenting with a few optimizations, and there are a few new options in the Raytracing Options section, check them out!

Ray traced reflections may look a little noisier, I'd like to get your feedback on that.

Here are the most noteworthy changes for this update:

Added screen-space GI tracing (and an option to toggle it)

Added (very rough and early) screen-space reflection tracing (and an option to toggle it)

Fixed some broken rain reflection stuff

Added rain splash to water

Added a new fix for sunlight leaking in caves (and an option to toggle it)

Added material darkening when wet (during rain)

Added rain fog 

Added option for GI Responsiveness, all but the lowest value show big improvements in GI responsiveness

Added option for GI filter quality (set to Low for a small speedup at the cost of GI denoising quality)

General improvements for GI filter, lower GI Responsiveness settings show improved detail in indirect lighting and shadows 

The requirements for running this shaderpack are as follows:

Minecraft 1.12.2 (no 1.13 support yet)

OptiFine 1.12.2 HD U E2

Options > Video Settings > Details > Alternate Blocks: OFF

Options > Video Settings > Details > Trees: Fancy or Fast (Smart may break lighting)

Options > Video Settings > Quality > Natural Textures: OFF

Options > Video Settings > Shaders > Shadow Quality: 1x

Options > Video Settings > Shaders > Old Lighting : DEFAULT

Resource packs with custom block models may cause issues

This shaderpack may work on older Minecraft versions, however compatibility is not guaranteed.

It is recommended that you run this shaderpack at 1080p or lower, since frame rate will drop dramatically as the game resolution increases.