With the "Mod Options" Mod active in your mod list, you have a wide range of options for adding additional visual quality and rendering features like Global Illumination (GI), Volumetric Fog or High-quality Shadows.
Get the Mod Options Mod here: https://www.nexusmods.com/mechwarrior5mercenaries/mods/537
vonBiomes Mod options:
Audio: Ambient Volume
vonBiomes adds environment sounds like rain and lightning, crumbling earthquakes, jungle birds and more. With the slider, you can adjust their volume. May need mission restart after change.
Quality: Use Volumetric Fog
Enables Volumetric Fog, that reacts to lighting and has a better visual quality. For lower performance systems, do not activate.
Performance: Volume Fog rendering distance
If Volumetric Fog is active, this is the max. draw distance of the effect. Higher values cost a little more performance. Recommendation: 100.000
Performance: Volumetric Cloud Samples
Volumetric Clouds are active by standard in vonBiomes. The number of samples represents their rendering quality. Higher numbers have a high impact on performance. Recommendation: 1
Look & Fix: Barrel Lens
The barrel lens effect bends and pushes the rendered view a little out. This can help if you experience tearing effects from volumetric clouds on the sides of your monitor. Recommendation: on or off
Performance: Disable Volumetric Clouds
Removes the Volumetric Clouds completely. This can help with the performance eon lower end computers. Additionally, for VR, disable the volumetric clouds, since they do not work on both eyes in Unreal 4.
Looks: Enable Global Illumination
Global Illumination or GI is an advanced render effect that adds light bouncing and makes the game visuals more realistic and authentic. Enable if you have a more powerful card from the Geforce 3000 RTX series or above.
Looks: Global Illumination Strength
This slider controls how visually strong the GI lighting effect is. Recommendation: 2.0
Looks: Soft Light Strength
Additionally, a soft light effect is in place in vonBiomes, which has very low performance impact and can even be used without GI. The slider controls its strength, Recommendation: 1.5
Looks vs Performance: Atmosphere Sun Light
With the checkbox, additional light options in Unreal are activated. Minor impact, recommendation on for more modern GPU cards.
Looks vs Performance: High-quality Shadows
The checkbox enables better shadows, that are more detailed. Recommendation: on for more modern GPU