Summary
Any Niagara system or emitter that uses “Multiply Linear Color by Float” (built-in Unreal function) fails UEFN map validation.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Other
Steps to Reproduce
- Create Niagara System using standard Fountain
- Set Particle Color in “Initialize Particle” to Multiply Linear Color by Float (any values)
- Drop the Niagara system into the map (anywhere)
- Try to Launch Session
Expected Result
Session launches, as this is a built-in, safe function.
Observed Result
Validation fails.
Found disallowed object type /Niagara/DynamicInputs/Multiply/Multiply_LinearColorByFloat.Multiply_LinearColorByFloat, Referenced by:See below for asset list, Plugin mount point:/Spaceship20.
/Spaceship20/Events/SpaceDefense/Aliens/FXS_AlienShip_Damage
Platform(s)
Windows 11
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Additional Notes
As a workaround, it is possible to convert color to vector, multiply vector, then convert vector back to color.
Another workaround might be to make a user-defined function instead.