I converted my cc3+ character to game conversion menu, replaced the eyes and mouth with game objects. I exported out and downloaded the cc4 to Unity asset. I’n Unity after building materials my character eyelash is wrong. I have brought in characters before to Unity doing the same steps but never converted to game conversion

From the looks of it the Opacity maps are missing for the eyelashes.

I don't use the Unity pipeline so I don't know how you could fix this.

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76% of original size (was 661x19) - Click to enlarge

I figured it out, when converting character to game objexct you need to select the box separate eyelash from body mesh. This