shader fails to load completely; no chat message. 1.20.4
iris doesn't show the failed to load error, I had to open the console in the launcher to see the failed to load error. the shader pack also drags into the shader pack selection screen as a "valid shader pack". the shader doesn't technically support 1.20.4, but I fail to see how there could be much difference between 1.20.1 and 1.20.4. shader used: https://www.curseforge.com/minecraft/texture-packs/old-lighting-old-water version: 1.20.4 mods used: advancementinfo-1.20.4-fabric0.91.2-1.4.jar badpackets-fabric-0.6.1.jar beenfo-1.20.4-fabric0.91.2-1.3.4-spigot.jar brainierbees-1.4.3.jar cherishedworlds-fabric-8.0.1+1.20.4.jar CraftPresence-2.3.9+1.20.4.jar dcch-1.3.jar deathlog-0.3.2+1.20.3.jar dynamic-fps-3.4.3+minecraft-1.20.0-fabric.jar emoji-type-2.2.3+1.20.4-fabric.jar entity-outliner-1.2.6.jar entityculling-fabric-1.6.4-mc1.20.4.jar fabric-api-0.97.0+1.20.4.jar fallingleaves-1.15.6+1.20.1.jar ferritecore-6.0.3-fabric.jar iris-1.7.2+mc1.20.4.jar lazydfu-0.1.3.jar libjf-3.14.3.jar lithium-fabric-mc1.20.4-0.12.1.jar modelfix-1.14-fabric.jar modmenu-9.0.0.jar morechathistory-1.3.0.jar nbttooltip-1.8.1.jar owo-lib-0.12.0+1.20.3.jar RepeaterSound-1.4.0_1.19.3+.jar replaymod-1.20.4-2.6.15.jar slyde-1.7.3.jar sodium-extra-0.5.4+mc1.20.4-build.116.jar sodium-fabric-0.5.8+mc1.20.4.jar sodium-shadowy-path-blocks-3.2.1.jar StackDeobfuscatorFabric-1.4.3+08e71cc.jar tooltipfix-1.1.1-1.20.jar Void-Fog-2.11.1+1.20.2.jar world-host-0.4.13+1.20.4-fabric.jar worldedit-mod-7.3.0.jar
The original feel of Minecraft 147.9K Downloads | Resource Packs
Solution
apologies for leaving you on read for so long, I decided to "do my own thing", so to speak me looking at the log sent me down a rabbit hole of downloading colormatic for the colormap shaderpack (a really good idea, apparently!), among other mods listed here (like the skybox mod) https://optifine.alternatives.lambdaurora.dev/. this has made the pack work AND work better than it otherwise would've. beta lighting! hoo-ray! only slight differences that I can't seem to fix are the skybox not really working, and the smooth lighting on the water while still retaining smooth lighting elsewhere, which there doesnt seem to be a mod to turn off specifically. oh well. if there's possible help with those two issues, I'd appreciate it. otherwise, I've solved the issue.