If you’ve ever tried to make eyelash hair cards work on Metahumans, you may have discovered that they don’t normally show up until LOD 2. But I thank God for showing me a very simple fix to enabling hair cards for eyelashes on Metahumans, so you can use eyelash hair cards even in LOD 0! 
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Select your “Eyelashes” Groom Component in your Character BP, and in the Details panel, under “Groom”, select “Use Cards”.
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Next, select the “Face” Skeletal Mesh Component in your Character BP, and in the Details panel, under “Materials”, find the material labelled “M_Eyelash_LowerLODs_Inst” (it should be Element 6), and double-click it to open it.
- Finally, inside the “M_Eyelash_LowerLODs_Inst” material instance, check the “Opacity” option and set its value to 1. Save the material instance, and you will now have working Eyelash Cards for Metahumans!
- As a bonus, if you are not able to see the eyelash hair cards in LODs 2 to 3 (by default they turn off in LOD 4 and higher), then repeat steps 2 and 3 above-- but this time for a different material, “M_EyeLash_HigherLODs_Inst” (it should be Element 10).
