creo8 config.pro option documentation for: ENCLOSURE_VOLUME_TRANSPARENCY            

enclosure_volume_transparency

Category: Creo Simulate

Description: Controls the enclosure volume transparency in shaded model display. You can change the value in the range between 0.0 and 1.0. The bigger the value, the more transparent the enclosure volume. The default value is 0.92.

Values:

Default Values: 0.920000