Devlog · tag
blueprint
17 entries tagged “blueprint”.
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Clearance
Grass growing through the ground floor of walk-in houses in Unreal Engine 5.8, because the floor sits a few centimetres below the landscape and the grass blades are 35 cm tall; also a new estate with no navmesh at all, front gardens sealed off by the agent radius, benches imported facing backwards, a D3D12 "Too many residency sets" crash on loading a World Partition map twice, and a player left lying on a cell bed forever.
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Off Duty
NPCs stuck at zero speed just inside their own open front doors in mirrored houses, because the door's nav links ran along the hinge line where the open leaf lies; thousands of "Blueprint Runtime Error - Attempted to access BP_Citizen_C pending kill or garbage" lines from a None check that a destroyed actor passes; a council worker whose walk to work ended at a navmesh island; and a whole cast re-dressed in parametric MetaHuman garments from Fab, where a recolour bound on the mesh never showed because the build's Blueprint overrides material slot 0, a Fab shirt ignored OpacityMask, and a trouser waistband poked through every untucked shirt.
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Loyal for Life
A skeletal mesh that explodes into giant shards in PIE in Unreal Engine 5.8 while its bounds read normal, because the Blender export put the root bone at scale 1 instead of 100; a stray dog AI that freezes when its flee point lands in fenced gardens; a Blueprint builder whose delete_node TypeError was swallowed so a graph doubled to 146 nodes with a clean readback; and a TextRender label that reads backwards.
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Edge-On
A Niagara water jet that drew nothing in Unreal Engine 5.8 because velocity-aligned sprites seen along their own velocity are edge-on and a Vector2 size passed as "4,22" was stored as unreadable text, an NPC snooker match costing 40.7 ms a frame in another building because WasActorRecentlyRendered on a Nanite mesh is only a frustum test, a door tick gate where GetDistanceTo measured every door at 0 m, and fuel pump nozzles that doubled each time a World Partition cell streamed back in.
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Cut and Fill
An NPC dog in Unreal Engine 5.8 that slid along the pavement without moving its legs because SetAnimation in single-node mode loads a clip paused, a landscape hole cut with LandscapeVisibilityMask after the legacy hole material had crashed three editors, a stray hole punched by clicking the viewport with the Visibility brush armed, a road-gradient check that passed while the carved terrain had 13 m cliffs inside 28 roads, and eight autograss buggies built in Blender to the real rulebook.
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The Queue
An NPC dog in Unreal Engine 5.8 that walked backwards after SetActorRotation(MakeRotFromX) and then lay on its side after MakeRotFromY, a CableComponent lead that ended a metre off the collar and vanished on tarmac, Blueprint officers who stopped 20 cm short of a front door forever, a looping dance clip that drifted an NPC off its actor with root motion off, a SceneCapture2D that rendered pure white at every exposure, and a parody energy drink can whose wordmark read NACKERED from the side.
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One Metre Past the Hook
A fishing fight in Unreal Engine 5.8 that snapped the line within 15 seconds whatever the player did, a caught fish that slid up the rod and ended up speared on it, and a CableComponent line that always finished a metre past the hook because EndLocation defaults to (100,0,0) relative to the end component - plus a fold-out chair, a five-minute snooze and a disposable BBQ you light with a lighter.
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Fog in the Sky
A volumetric cloud storm that makes one in the afternoon as dark as night, exponential height fog with FogCutoffDistance 0 painting the whole sunset sky one flat colour, the white edge halos a 30 km fog cutoff leaves round every roofline in rain, an unlit horizon cloud band that glows white at night, and wet footprint decals laid back to front, all in Unreal Engine 5.8.
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Two Bright Readings
Street lamps that switch on at dusk while the street stays black because the exposure is still pinned to daytime, a lightning bolt from Blender that imports invisible because FBX flips the UV V channel, a lightning flash light placed 312 m up that turns every roof and road white like snow, and a WidgetComponent petrol pump screen that is almost unreadable because the widget material is lit, all in Unreal Engine 5.8.
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Background Hum
A decal that lays across parking bays, then renders upside down and paints the bollards green in Unreal Engine 5.8, an editor that runs out of memory setting material instance parameters with a big World Partition level loaded, an impure Blueprint call inside a return node pruned with "Exec pin is not connected" so no car lamp could ever light, and a refused pick-up that leaves an invisible item in the player's hand.
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Crosshair First
An interaction line trace in Unreal Engine 5.8 that starts at eye height instead of the camera and misses small objects under the crosshair, a grow lamp that looks lit at start because another actor's BeginPlay resets it under World Partition, pressing E with a full hand silently destroying the held item, and a translucent ghost that is invisible at 5% opacity and darkens the room instead of glowing.
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Substantially Enclosed
An NPC who stops three metres short of a nightclub toilet because a 1.05 m doorway is too narrow for a navmesh agent radius of 35 cm, a heater whose emissive material pulsed to the music, a light A/B test in Unreal Engine 5.8 where 400, 120 and 0 lumens all looked the same, and a hall and cellar blown out white by a pinned exposure and the editor sitting on Low scalability.
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Shuffle Turns
A MetaHuman walk clip that made two snooker players walk 20 cm crouched because it carried another body's bone lengths, a turn-in-place animation whose planted foot skated 20-70 cm because the clip was a shuffle, a one-metre teleport at every corner of an offset path, and an Unreal Engine 5.8 editor crash in USoundCue::Parse from a SoundNodeRandom whose child_nodes were set from Python.
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Two Frames
A Blueprint snooker solver in Unreal Engine 5.8 pinned at its MaxSubsteps cap and a
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The First Time Anybody Looked
A day of green numbers on the snooker club - 30,009 rules checks passed, 139 voice
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Signs in Mid-Air
Fitting out the bookies on the corner - carpet, wallpaper, a lowered branded ceiling raft, a counter and two fruit machines - and the four traps that made it take twice as long. A centre-pivot cube that threw the ceiling signage into mid-air, a rug that shipped as the engine checkerboard while every readback insisted it was perfect, a second run that refused to wallpaper the walls it had just papered, and an editor that reported an actor missing right up until two of them turned up in play.
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Zero Bytes
A one-line find-and-replace destroyed 155 KB of hard-won build notes on a project with no version control, because opening a file for writing empties it before anything can go wrong. Ninety-six per cent of it came back out of the AI agent's own session transcripts, and the recovery had four wrong turns of its own. Also - the fruit machine that paid nothing because a perfectly correct function was called by absolutely nobody.