Particle Alpha interpolation below 0.05 not working

Using Alpha value differences below 0.05 in the “Color Over Life” module will freeze the value. Deactivating the “Can Be Baked” checkbox in the same module will aloow it to interpolate. It occures on also on more than 2 interpolation key points. As long as the difference to the next value is lower than 0.05 it won’t interpolate.

I’m not sure if this is intended with the “Can Be Baked” option or just a bug.

Edit: Color seems to have the same issue…

Tested in 4.18 and 4.19.
4.19 Testproject in the attachment

can conform and was about to report his.
Not only color over life but basically any value thats below 0.05 and 0
also seems to happen in 4.17 (at least the dynamic node)


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ok, I finally came around to create a bug report. Unreal Engine Issues and Bug Tracker (UE-62978)