Find rivers on your map that run uphill or end in the middle of nowhere

A river that climbs a hill makes the explorer's travel notes absurd, and one that just stops raises questions the story cannot answer. Here is a check that walks a river cell by cell against the height of the land and tells you the exact spot where it goes wrong.

Why this works

Water always runs down, so a river is a test of the land under it. Walking the river step by step against the heights shows the exact place where it breaks the rule, and tells you whether to dig a valley or raise a hill.

When not to use it

Skip it for a world with magic or odd physics where water can climb, or for rivers drawn only as decoration. Also skip it for rivers that vanish underground on purpose; mark those as caves instead.

In the full entry

• What to build, step by step
• Starting values and the reason for each
• 3 common mistakes and the fix
• A diagram of every state
• 32 lines of example code with 5 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "Find rivers on your map that run uphill or end in the middle of nowhere" (read_entry river-that-flows-uphill-in-a-generated-map) in my game. Build it step by step, and show me how you checked that it works.

Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP