195Customizing Eye Types How to Customize an Eye Type8. Within the OS Material/Velocity table, rotate theknob to select the VC Velocity cell. The velocitymay need to be changed to correlate to the changein material.9. Within the VC Velocity cell, rotate the knob toadjust the velocity.10. You can also press the button beneath the selec-tion "Edit Text" and enter the material name; thematerial doesn’t have to be pre-entered.[All eye types include an assumed cornea]Figure 134 Changing Velocity Field
