Mountains on procedurally generated roads

I made a script to procedurally generate groups of roads and mountains.

Currently, the “mountains” are just a set of 5 parts on each side of the road.

(The script will generate varieties of forms, like curves, ramps, etc. Not just a straight line. But will always be the same road part.)

Although it works, using these boring parts to simulate mountains don’t look good.

How can I make mountains like the ones on Yugo: the non-game and that can be easily connected to each other (as the roads will be procedurally generated)?

Maybe make some meshes on blender and export to roblox? Maybe use images to simulate mountains? (but I need real parts or meshes to connect to the actual road too)

Any help is appreciated!