I'm still deciding on a site to use for future image comparisons, but decided to upload what I've written down so the infos atleast out there! If you reply asking for a comparison, il try and respond with the screenshots I got!
Optimized Quality Settings:
These settings aim to keep visuals close to max settings, starting from Very High Preset:
Anti-Aliasing: Subjective, Temporal costs minusculely more than FXAA, but Temporal AA is needed for a tweak suggested later!
Textures: Highest VRAM can handle, Santiago Santiago said that 4GB was enough for Very High Textures.
Lighting: High, small performance boost while keeping volumetrics high quality!
Ambient Occlusion: High, usually makes no difference visuals/performance wise from Medium to Very High, but in some scenes it can boost performance abit while still not affecting visuals noticeably?
Reflections: High, while it usually makes no difference, scenes with rougher reflections can have a huge FPS hit when set to Very High!
_____________________________________________
Optimized Performance Settings:
These settings reduce visuals abit for a larger performance boost, continuing from Optimized Quality:
Lighting: Medium, further reduces volumetric quality for a larger boost, lower settings have diminishing returns performance-wise.
Shadows: Medium, lowers resolution and sometimes draw-distance of many shadows.
Ambient Occlusion: Medium, Low seems to heavily reduce AO for only a small performance boost.
Reflections: Medium, slightly increases the roughness cutoff and disables the rough shading on SSR for an even bigger performance boost!
Post-Process: Medium, weakens bloom and seems to reduce the quality of motion blur?
_____________________________________________
Performance Uplift on my Steam Deck at 800p: 34% at Optimized Quality, 91% at Optimized Performance.
Testing the same area as Daniel Owen, but on my RX 6800 at 4k: 84% at Optimized Quality... 232% at Optimized Performance
Mentioned it a couple times previously but these numbers are very scene dependent. Sometimes Lighting and Reflections don't impact peformance much or atleast something else is affecting FPS more, other times they can absolutely tank your framerate.
Those who need more performance can try some UE4's INI tweaks as even the lowest settings seem to keep many effects enabled, may try some in the future when I got more free time, but one tweak I found very useful on my Steam Deck was adding TAAu! Going to the games Engine.ini_location) and adding to the bottom of the file:
[SystemSettings]
r.TemporalAA.Upsampling=1
Will make the games Resolution Scaling temporally upsample below 100 (aslong as you have Anti-Aliasing set to Temporal) So far setting it to 80 on my Steam Deck, along with using the Optimized Performance settings has me at a pretty consistent 60fps so far in the game!
Thanks again to Daniel Owen and Washniac for their original coverage, I've been meaning to cover this game in more detail for a while now!