What causes foundations leaving gaps on sloped terrain?

Foundations snap only to a flat grid height and ignore terrain elevation, so on a slope they float on the high side and gap on the low side.

How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix Foundations Leaving Gaps When Building on a Slope

Quick answer: Sample terrain height under each foundation, allow vertical stepping between neighbors, and add pillar or stilt support to bridge the gap to the ground.

Players try to build across a hillside and end up with foundations floating on one corner and a visible gap underneath on the other. The grid only snaps horizontally and ignores elevation.

How to fix it

1. Sample ground height

Line-trace down at the placement point and offset the foundation so it rests on or near the terrain, instead of forcing a single flat grid height.

2. Allow height-stepped snapping

Let adjacent foundations snap at a vertical offset so a staircase of foundations follows the slope, rather than demanding all pieces share one elevation.

3. Auto-fill with pillars

Where a foundation overhangs lower ground, spawn pillar or stilt supports down to the terrain so there is no gap and the structure reads as grounded.

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 Unreal Engine 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.

Ship the fix, watch the signature disappear from the next build. That's how you know it's really gone.