Maya modelling tutorial how to use a negative blendshapes to really save yourself when you’re in a tight-spot in production. It can also be used to enhance your Maya models, often if your models come from ZBrush.
How to use negative blendshapes in Maya
When on, you may input terrible weight values for a blend shape deformer. When off, the minimal weight cost is zero and bad values are not supported. This choice is off via default.
Specifies the deformation scale factor. Use slider to select values from 0.000 to 1.000. You can also enter values from -2.000 to 2.000. A value of 2.000 would double the overall deformation effect. A negative value inverts the effect. Default is 1.000.