Hello,
Thank you for the inquiry.
Ornatrix ABC export will export the hair curves (without the character). V-Ray proxy or any other ABC reader can then read in this hair without Ornatrix. You can control many parameters for exporting the hair curves like whether to export UVs, width, render or viewport hairs, and animation. You can merge the ABC file with a character if you wish later on.
If you save a scene with character which uses Ornatrix hair people can render it by installing our demo version. The only limitation that demo has is inability to save so loading and rendering the scene is entirely possible.
You can always take the hair guides from Ornatrix and convert them to 3dsmax native splines. These can be used by any other hair solution like Max's native hair if you wish.
Let me know if you need more information.
Marsel Khadiyev (Software Developer, EPHERE Inc.)