Minecraft HRR Test 2 Download Link : https://file-link.net/187054/SEUSPTGIHRRTest2
Minecraft SEUS PTGI Pre E13/HRR Test Download Link : https://ihaxk.com/2020/08/09/minecraft-seus-ptgi-pre-e13-hrr-test/
Minecraft SEUS PTGI E12 Download Link : https://ihaxk.com/2020/03/21/minecraft-seus-ptgi-e12/

Setup instructions:

• Minecraft 1.16.4 (older version compatibility may be present but is not guaranteed)
• OptiFine HD U G5 or newer
• 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 will probably cause lighting glitches!!!!!!

Edit: Here is HRR Test 2.1.

There is a known bug where sometimes the reflections appear black, if you encounter that try doing F3 + R.