Is it ok to have UPM 6000?

[Sigurdur Armannsson]

I got sent a font by a designer who is asking me to finish few technical matters, naming and saving to OpenType.
He worked his font in Illustrator and copied the glyphs over to FontLab. He had not read my directions on how to do this (http://font.is/?p=48). Because he had not aligned the nodes to a correct grid in Illustrator he got a distortion of vital points in the design. To avoid this he raised the UPM to 6000. Now, FontLab gives three preset options for UPM, 1000, 2000 and 2048.

My question is: Is it ok to let the UPM stay in 6000 in the final font?

[Der FontMeister]

MS Word usually doesn't like things like this but give it a try

Jimmy G.

[Sigurdur Armannsson]

Thanks very much.

[Der FontMeister]

Just a note - The Truetype spec expects em squares in multiples of 1024

Jimmy G.

[Luc[as]]

For PostScript: stick to 1000 UPM.
For TrueType it doesn't matter at all, but: each point must be within the range -16384 and +16383 FUnits, and outline scaling will be fastest if units per em is chosen to be a power of 2, such as 2048, which shouldn't really be an issue with todays processors.

L.