dh and iris just not working

DH LODs + Shaders results in an Illegal State Exception and LOD rendering being disabled on macOS
Game in 1.20.1 Crash du to iris 1.7.2+mc1.20.1
Water/shadows are glitching
Weird Flashes randomly appearing
Doesn't load the videocart

Question! Most recent DH version compatible with Iris in 1.21
a weird thing :/

Iris 1.8.0 beta 4 crashes when I turn on any shaders
crash on prism launcher with iris beta 4
Transparency/Translucent Issue with Mod Rendering
WorldRenderEvents
call from BEFORE_DEBUG_RENDER
to AFTER_TRANSLUCENT
or LAST
. This fix does not work with Iris installed though.
- Changing the shader program on my contrail render layer from the tripwire program to the translucent program....
Repeatedly crashing even with only Iris, Sodium, and DH
Nether portal disappears through glass. Iris 1.7.3 on 1.21.

skylec shader dont work, help me pls, it doesnt crash at all
distant horizons 1.21.1
How does the installer work? can't seem to get it to install.
Game keeps crashing, while trying to open a new world
Iris 1.8 Forge Snapshot Tetra Shading Issue

iris shaders