like 90% of the vehicles in the game that use the default diesel sounds are semi trucks so why would you use a pickup truck engine? that doesnt make any sense
if its crashing when trying to load a terrain then you're probably having issues with ogre, which is what your error says. ogre probably cant run on a pi
thats because they use set_beam_defaults which isnt read by the importers. speaking from personal experience you arent going to get anyone to even touch things for ror even if you're willing to pay them.
i tried to hire people to port therornet code to a newer python version and no one would...
what? we have had .truck importers/exporters and .mesh importers/exports for 2.79 for years now and some people in the community have already made plugins for 2.9
the reason it does this when you select the content packs is because you cant connect to the server where they are stored. this is caused by no/spotty internet, and/or an issue with our servers.
adding a texture file isnt all you have to do... you have to add in a material file with the material name of the mesh with the texture assigned to it...