Fresnel Mod 2.11 ( Unofficial ) addon - The Dark Mod (Standalone) for Doom III

In TDM 1.03, Doom 3 modder "JC Denton" added the new "HDR-lite" shaders which included Fresnel effect and darkening below objects. Many of these features were modified or removed when TDM was converted to use GLSL. This mod restores most of these effects.

This mod also adds distance based darkening from the player

Installation:

1) Rename tdm_base01.pk4 in your darkmod directory to tdm_base01.pk4.old

2) Copy this file in to your darkmod directory and make sure it is named tdm_base01.pk4

To revert, simply delete the file and rename tdm_base01.pk4.old back to tdm_base01.pk4

Note: This mod works with the default ambient_world light shader ( which now used cubemap based lighting in 2.11 ) but may not work well with other cubemap based ambient lights. If there is sufficient demand, I can create an alternative shader that only modulates standard ambient lights and includes an override material that returns the ambient light to a 1D+2D format so that maps with custom cubic ambient lights (if they ever get used) will not encounter issues.

April 24th 2023: Small fix to clamping math to avoid crashes