They can still wear saddles be tamed etc but just cannot be mounted by a player.
The reason behind this was wanting to use Maeguana on Ragnarok for breeding but I wanted to limit their ability to break the meta for travelling around the map.
The way the mod works is by applying a buff to every dino listed in the config, please note that alternate version of a creature will all need to be listed for example preventing riding a parasaur will not prevent riding an aberrant parasaur without also adding it's entry to the config. The dinos that are in this config just have their "Equip saddle to ride" and "Ride" options removed from their multi use radial wheel. For this reason I expect there to be some missed edge cases, if you run into one such case please leave a comment and I'll look at addressing it.
[Prevent Dino Riding]
PreventRidingClasses=Rex_Character_BP_C
To add more than 1 dino use a comma to seperate them.
[Prevent Dino Riding]
PreventRidingClasses=Rex_Character_BP_C,Para_Character_BP_C
If theres a desire for it I could look at adding a whitelist rather than a blacklist ie you would only enter dino entries you wanted to be able to ride but as I have no use for it I'll wait for it be requested.
The gallery has examples of what the mod does, the screenshots were taken with this config
[Prevent Dino Riding]
PreventRidingClasses=Rex_Character_BP_C,Para_Character_BP_C,Maelizard_Character_BP_C