After 8 months of development, we are proud to finally announce the initial release of Iris for Minecraft 1.16.5 and above!
It is compatible with the existing shader format that most shaders use, and though features are still being added (some shader packs do not work yet), many shader packs already work! Sildur's Vibrant Shaders, Sildur's Enhanced Default, BSL, Complementary, and SEUS (v11 and Renewed) work well with Iris, and I recommend them highly!
We recommend using the 1.0.0 build, as the standalone build does not include Sodium and will have poor performance.