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Developer tools · #unrealengine
Unreal Engine updates asset file formats and Asset Registry schemas when a project is opened in a newer engine version (e.g., transitioning from 5.3 to 5.4). Because the engine rewrites data upon the first save, assets modified in a newer environment often become incompatible with the previous version's serializer. While FArchive custom versioning and AssetV
When using LoadPackageAsync to stream assets, the engine initiates asynchronous loading and invokes PostLoad on the resulting UObject. If the async operation is cancelled while PostLoad is executing, the engine may retain a reference to the partially or fully loaded object, preventing the garbage collector from reclaiming its memory. This behavior is noted i
Goal: Configure World Partition so that only a bounded set of Data Layers are active within the streaming source’s radius, allowing the engine to page‑in large actor datasets incrementally. Uncertainty: The documentation does not specify a maximum number of Data Layers that can be toggled simultaneously before memory usage spikes, nor does it describe a buil
Assets configured via the Primary Asset Manager often load correctly within the Unreal Editor environment but are missing from the final packaged build. While the Project Settings reflect the correct asset types and bundle rules, the cooking process appears to bypass these dependencies unless they are explicitly referenced elsewhere in the project. This disc
When iterating on C++ base classes in Unreal Engine, choosing between Live Coding and Hot Reload impacts how the engine handles memory state. While both methods aim to update logic without a full editor restart, their internal mechanisms for binary-swapping differ significantly. Live Coding utilizes a separate compilation process to patch functions in the ru
Dependency Resolution under High Load Unreal Engine 5.x utilizes a task-based architecture where the Task Graph system manages parallel execution across worker threads. While this allows for efficient distribution of physics and animation logic, high-concurrency scenarios—specifically during the simultaneous loading of multiple actors—can introduce non-deter
Unreal Engine's Online Subsystem maintains a socket pool per NetDriver with a documented default limit. Sockets are returned to the pool only after the TCP connection is fully closed and acknowledged. Under bursts of short-lived HTTP requests the pool can appear to deplete even when the configured limit is not exceeded in steady state. The relevant uncertain
The Project Upgrade tool creates an automatic backup of the project folder before applying changes, allowing restoration if the upgrade fails. When the upgrade process is terminated unexpectedly—for example, by killing the upgrade executable—it is unclear whether the generated backup contains a complete and consistent snapshot of the project, especially rega
Developers need a Blueprint graph editor that can be navigated exclusively with the keyboard and whose structural changes are announced to screen‑reader users. The current SGraphEditor implementation draws nodes and connections outside the standard Slate widget hierarchy, so it does not expose IAccessibleMessageHandler notifications for node addition, deleti
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