Bug Reporting for Games with Cover Systems

Cover systems let players snap to walls, crates, and corners, peek and shoot from cover, and move between cover points, and they are central to the feel of many third-person and tactical shooters. They are also a rich bug source, because cover depends on detecting the geometry around the player, snapping them cleanly to it, transitioning between cover points, and blending cover with shooting and movement, all of which can break against the endless variety of level geometry. Like other geometry-dependent systems, cover bugs depend on the cover state and the surrounding geometry. Tracking cover-system bugs means capturing the cover state, the player position, and the geometry behind a cover interaction that went wrong.

Cover systems depend on geometry

A cover system detects the cover available around the player, walls, crates, low and high cover, corners, and lets the player snap to it, peek and shoot from it, and move between cover points, all driven by the geometry of the level. This makes cover fundamentally a geometry problem, the system must interpret the surrounding geometry correctly to offer good cover, and the geometry of a real level is endlessly varied, far beyond what any designer placed deliberately.

The consequence is that cover bugs cluster against geometry: cover that is detected where it should not be or missed where it should be, a snap that places the player wrong against an odd surface, a corner or gap the cover system handles badly. These emerge from the interaction between the cover system and the specific geometry, like the geometry-edge bugs of any system that reads the level. Understanding that cover systems depend on geometry, with bugs against the geometry's variety, frames the bug tracking: capture the cover state and the geometry where a cover interaction broke.

Capture the cover state and player position

The core context for a cover-system bug is the cover state and the player position, what cover the player was in or near, the cover type, the player position and orientation relative to it, since a cover bug is about the player's interaction with a specific piece of cover at a specific position, and reproducing it requires knowing that state. Capture the cover state and position when a bug is reported.

Capture where the player was, what cover they were snapped to or attempting to snap to, and the geometry there, with a screenshot, since a cover bug, a bad snap, a stuck state, a wrong peek, depends on the player position and the cover involved. A report of a cover bug becomes diagnosable when you can see where the player was, what cover they were interacting with, and the geometry around them. The cover state and player position are the situation from which the cover bug emerged, and capturing them is the foundation against which the detection, snapping, or transition bug can be diagnosed.

Watch the snapping and transitions

The signature cover-system bug is in the snapping and transitions, the player snapping to cover wrong, into a bad position, into cover they did not intend, or failing to snap, and the transitions between cover points breaking, a move between covers that goes wrong, a vault that fails. These are where the cover system's character lives, and where its bugs concentrate, since the snapping and transitions must work against all geometry.

A particularly damaging cover bug is getting stuck, the player snapped into cover and unable to leave, or stuck in a transition, since being stuck in cover, like being stuck anywhere, can strand the player. Capture the cover state when a snapping or transition bug is reported, including a stuck state, since it reveals the cover and geometry that produced it. Watching the snapping and transitions, capturing the cover state of snap, transition, and stuck bugs, covers the central dimension of cover systems, where the snapping and movement between cover produce the genre characteristic bugs against the level's geometry.

Capture the shooting and interaction context

Cover systems blend with shooting and combat, the player peeks, blind-fires, and shoots from cover, and bugs occur in that blend, a peek that exposes the player wrong, a shot that hits the cover instead of out, an aim that breaks from cover, since cover and shooting must integrate cleanly. Capture the shooting-from-cover context when such a bug is reported, the cover state and the shooting situation.

And capture the interaction with movement and enemies, since cover interacts with the player's movement into and out of cover and with enemies who also use or attack cover, and bugs occur in those interactions, cover that does not protect as expected, enemies who behave wrong against cover. A report of a cover-shooting or cover-interaction bug becomes diagnosable when you can see the cover state and the shooting or interaction situation. Capturing the shooting and interaction context covers the combat dimension of cover systems, where cover blends with shooting and enemies, alongside the snapping and transition bugs, together capturing where cover systems produce their bugs.

Setting it up with Bugnet

Add an in-game report option and attach the cover state, the player position and orientation, the cover type and geometry, and the shooting and interaction context as custom fields, with a screenshot. Bugnet stores them so a cover-system bug arrives with the cover-and-geometry context needed to see where the player was, what cover they interacted with, and what broke, which is essential since cover bugs depend on the specific geometry you cannot test everywhere.

Group identical reports into occurrence counts, watching whether bugs cluster around particular cover positions or geometry, which would point at a problem with the cover system at that spot. Because cover systems depend on the level's endless geometry, the captured context is what lets you reproduce the cover interaction the player had and see the bug, finding whether it is a detection issue, a snapping or transition bug, a stuck state, or a shooting-from-cover problem, keeping the cover system working against the geometry players actually move through, which is exactly where the genre bugs hide.

Test the geometry edges and watch for stuck spots

Because cover bugs are against the geometry, test the geometry edges, the corners, gaps, odd surfaces, and cover arrangements most likely to confuse the cover system, since you cannot test every position but can test the boundary cases and the geometry most likely to break detection or snapping, like testing the edge cases of any geometry-reading system. Testing the geometry edges catches the cover bugs most likely to appear.

And watch especially for stuck spots, places where the cover system can trap the player, since being stuck is among the most damaging cover bugs and tends to recur at particular geometry. Pair the geometry testing with your captured reports, which surface the cover bugs players hit against the geometry and positions you did not test, since players move through the level in ways you could not anticipate. Together they keep the cover system working across the geometry players encounter, ensuring the snapping, transitions, and shooting from cover that are the genre's appeal hold up rather than producing bad snaps, stuck states, or broken cover combat.

Cover systems depend on the level's geometry. Capture the cover state, position, and geometry, and watch for stuck spots.