Does scale matter?

 From:  angeliclight
1688.1 
Hi, there,

Nebulous title, I know, so apologies in advance. :)

I just bought MOI and haven't done much modeling (in any program) yet, so this might seem overly basic. When you're importing an image to model by, does it matter how big or small it is, obviously taking into the fact that you can see enough detail?

I mean, I could import an image to where it could be huge or small depending on my scan or camera settings, and don't know if there's any implications of scale when exporting to the next program.

Any suggestions or best practices here?

Thanks to all who read or respond,

- A