How to Fix Free-Climbing Surface Detection

Free-climbing detection bugs are inconsistent surface tests. Robust detection fixes them. Here is how.

How to fix it

1. Check distance, angle, and type

Cast rays from the player to detect a surface within reach, at a climbable angle, and tagged climbable. Missing any of these lets the player grab non-climbable or out-of-reach surfaces, or fail valid ones.

2. Handle ledges and edges

Detect ledges and top edges separately so the player can mantle and transition off the surface. A climb system that only handles flat walls sticks the player at the top with nowhere to go.

3. Validate the grab position

Confirm the grab point is reachable and clear before snapping the player to it, so they do not grab through a gap or clip into geometry. Validating the position keeps climbing from teleporting the player oddly.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.