This should help you.
Here is a character with a lot of red x in his face.
- Go to the scene manager
- Select the nose (or another part)
- Find in the modify panel in the material list the dummy and select this item.
- Scrol down and you see the opacity is 50
- Set the opacity slider to zero
- The red X is gone
- If necessary repeat this for other parts with a red x
The result:
Best Regards,
Arie