Since Mario Kart World is open-world, racers can drive off-road. This makes precise ranking difficult. To solve this:
1. Assign a value btw 0-1 to intermediate points along a route

2. For any point off-road, a value is calculated based on closest intermediate points

3. Using this method, a grid of values for the map is generated pre-race

4. When a racer is off-road, their ranking is calculated based on nearby pre-generated grid values

This way MKW can accurately grant Blue Shells to lower-ranked players. Source: patent application US20260061310
[Originally posted on 2026-03-06 Pacific Time]