In 1.21.4 with shaders disabled, the DH fog doesn't show, even when trying to enable the fog manually in the DH settings. Ive removed Iris mod and I can re-enable the fog easily. I'm not sure this is a DH issue or a Iris Issue but I just report I here first because its the mod that causes the issue. I also provided screenshots of what it looks like just in case. DH Version is the latest nightly release.