Is there a specific or correct name to give positions of the points that call out MIP locations?

For example, lets say North West and South will have textures. They will need "T=<U, V>" to give them spots in the MIP....

The reason I ask this, is every now and then when I make a MIP too small OPE will not start and it gives me an error about "U and "V". When I increase the MIP size this will fix it.

Code:

`3D VERSION 3.0;`

% (0,0) (275,0)

% A----------------------------------B

% | north |

% | |

% | |

% | |

% | |

% | |

% | h121 |do not draw east

% | |

% | |

% | |

% |west |

% | |

% | |

% | |

% | |

% | south |

% D----------------------------------C

% (0,-265) (275,-265)

%

%roof

Ar: [<X, Y, Z>];

Dr: [<X, Y, Z>];

Cr: [<X, Y, Z>];

Br: [<X, Y, Z>];

%south

D1s: [<X, Y, Z>, T=<U, V>];

D0s: [<X, Y, Z>, T=<U, V>];

C0s: [<X, Y, Z>, T=<U, V>];

C1s: [<X, Y, Z>, T=<U, V>];

%west

A1w: [<X, Y, Z>, T=<U, V>];

A0w: [<X, Y, Z>, T=<U, V>];

D0w: [<X, Y, Z>, T=<U, V>];

D1w: [<X, Y, Z>, T=<U, V>];

%north

B1n: [<X, Y, Z>, T=<U, V>];

B0n: [<X, Y, Z>, T=<U, V>];

A0n: [<X, Y, Z>, T=<U, V>];

A1n: [<X, Y, Z>, T=<U, V>];