Unwrapping settings.
Use them only if you fully understand what they mean.
| angleError | Maximum allowed angle distortion (0..1). |
| areaError | Maximum allowed area distortion (0..1). |
| hardAngle | This angle (in degrees) or greater between triangles will cause seam to be created. |
| packMargin | How much uv-islands will be padded. |
| SetDefaults | Will set default values for params. |