Unfortunately the Master Chief Collection does not have all the same functionality as Custom Edition and Open Sauce. As a result, we did have to cut or modify certain features.

Features from the original TSC:E that couldn't be ported to MCC:

• Vehicle boarding
  
• Ghost boost
  
• Covenant vehicle EMP
  
• Loadouts
  
• Advanced rendering features (normal and specular mapping on objects, directional lightmaps, postprocessing, etc.)
  
• Overshield FX on the player
  
• Skybox switching (only used in the special difficulty)

Features that were ported, but are missing full functionality:

• AR/GL's secondary trigger no longer coexists with grenades, overrides grenades instead
  
• Shader turret ball can't be detached from the base
  
• Checkpoint selection menu was replaced with the developer room
  
• A few special difficulty gags had to be replaced

While we lost the OpenSauce rendering features, we overhauled our shaders & textures to better match the original look using stock techniques. It is also worth noting that MCC did allow us to implement full co-op functionality, which was NOT in the Custom Edition version.

Thank you for your kind answer. I figured some things were exclusive to open sauce just cause of the different engines and the fact that i tried to unccesfully board the enemy vehicles numerous times lol. But at the same time the mod is just as good as the halo ce version, the lighting on the cavern zone is peak halo ce imho.