Info it told me to copy:
composite2: composite2: WARNING: Could not find vertex shader attribute 'at_tangent' to match BindAttributeLocation request.
WARNING: Could not find vertex shader attribute 'mc_midTexCoord' to match BindAttributeLocation request.
WARNING: Could not find vertex shader attribute 'UV0' to match BindAttributeLocation request.
WARNING: Could not find vertex shader attribute 'iris_Entity' to match BindAttributeLocation request.
WARNING: Could not find vertex shader attribute 'at_midBlock' to match BindAttributeLocation request.
WARNING: Could not find vertex shader attribute 'mc_Entity' to match BindAttributeLocation request.
WARNING: Output of vertex shader 'zMults' not read by fragment shader
WARNING: Output of vertex shader 'iris_FogFragCoord' not read by fragment shader
ERROR: Implementation limit of 16 active fragment shader samplers (e.g., maximum number of supported image units) exceeded, fragment shader uses 17 samplers

it happens on all worlds, and if i try using a stable release it removes the distant horizons LODs, its on the latest in-dev version