Hi,Jenova, New and old PBR substance materials are not completely compatible. Use the following steps to completely remove the eyebrows: 1) Select the actor and click on Activate Appearance Editor under Modify > Appearance tab. 2) Expand Actor > Skin_Head > Skin > Head_Base section. 3) Select None for LightTone in the dropdown menu. 4) Expand Actor > Skin_Head > Hair > Eyebrows section. 5) Select None for Type in the dropdown menu. 6) Check the actor's eyebrows. Reallusion