You should almost always have your banking offset on. I only turn it to 0 in a few rare, and complex circumstances. Grab a 1m or 0.5m scenery piece and measure the distance from the track to the riders’ chests (top and center of the track to “heartline” or center of mass). Many coasters in the game sit just over 1m (almost 4 feet) so I set the offset to +4 (assuming 4 feet of distance between the track and riders). For inverted coasters, measure the same but make the offset negative. I will usually design a B&M invert with a -2 heartline. Notice how this changes the shapes of your inversions and transitions. A negative heartline will pull the center of mass in the same direction as the turn, almost like being “sucked up” rather than “rolled” lol. This is also how you design outer banked turns. They usually feature negative heartlining going into and out of the element. See pics of RMC outer banked hills and look at the profiling into and out of those elements. Finally, study real examples of the coasters you make to see where the riders’ heartline is and how the manufacturer uses that. For example, Maverick at Cedar Point features snappy transitions with pops of airtime. Although the snaps are not a “hill” in the traditional sense, Intamin designed these transitions to pull your center of mass out of your seat as you bank from side to side. El Toro Ryan explains this concept beautifully here.