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Comments
thanks for your interest in Live2D. I guess you are referring to the "border" around the mouth. Please try the following three things unless already done:
1) In the Live2D Modeler enable "Apply the Dropped Color Prevention to texture" when exporting the moc file.
2) Within Unity make sure that "Alpha Is Transparency" is enabled for the texture(s) that the model is using. You can find those settings in the inspector when selecting the corresponding texture asset.
3) Make sure that in the same settings "Format" is set to "Truecolor".
However this is happened in the Modeler. I haven't export it.
Great work for your first day with Live2D by the way!
I always try every limit of a feature. This means i must be careful on creating mouth and it's movements. Thanks again!