Summary
Our engineering and art teams are currently doing heavy optimization passes on our projects. Our goal is to minimize memory footprint and reduce overhead by stripping unnecessary collision, interaction, and physics logic from decorative Fortnite props. However, we are encountering a workflow blocker: UEFN is silently reverting specific property overrides back to their default states on certain Fortnite assets.
The Issue: We are systematically disabling and changing some settings related with physics, weak spots, and interactions on specific instances to save performance. After saving and continuing development, we notice that the engine forces these modified assets back to their default configurations. This does not happen to every single asset, but it is widespread enough to make our optimization efforts unpredictable and untrustworthy. Specific properties being reverted:
Based on our audits, the platform is overriding our custom checks on the following component settings:
• Collision Settings: Collision Presets resetting from NoCollision or FortStaticMesh back to defaults.
• Physics & Bounce: Play Bounce and Propagate Bounce Effects being re-enabled.
• Structural Support & Weak Spots: Register with Structural Grid and Forcibly Structurally Supported being re-enabled. Allow Weak Spots and Use Complex for Weak Spots checking back on.
• Interaction & Damage: Allow Interact and Show First Interact Prompt being re-enabled. Allow Team Damage enabled too.
Our questions:
Is this intended behavior? Are there hardcoded protections on certain Fortnite assets that prevent developers from permanently overriding these specific values? Is there a recommended workflow? If directly editing these instance properties is prone to being overwritten by platform updates or engine validation, what is the correct Epic-approved method for bulk-optimizing these specific actor traits? Is this a known bug being tracked?
Thank you very much
Please select what you are reporting on:
Optimization settings reverted
What Type of Bug are you experiencing?
UEFN silently reverts some optimization properties in Fortnite Assets