Arbitrary yes, but its *Usually* logical:
1 "unit" in a 3D program might be anything in b3d "3D Units". ie; 1:0.1 , 1:1 , 1:10 or 1:100 but i have never encountered something weird like 1:2.34
A simple way of testing is to make a small cube in max scaled to exactly 1M cubed (thats a Meter, not a Mile!:), export it and mesure it in blitz using meshwidth. From this result you can create an accurate scale factor for scaling your world 1:1 to match the 3D app.
A B3D 3DU can be anything you like but I reccomend scaling 1 meter to 1 blitz unit. (I would use this for an RPG or FPS but of course it depends on the style of game.)
1 "unit" in a 3D program might be anything in b3d "3D Units". ie; 1:0.1 , 1:1 , 1:10 or 1:100 but i have never encountered something weird like 1:2.34
A simple way of testing is to make a small cube in max scaled to exactly 1M cubed (thats a Meter, not a Mile!:), export it and mesure it in blitz using meshwidth. From this result you can create an accurate scale factor for scaling your world 1:1 to match the 3D app.
A B3D 3DU can be anything you like but I reccomend scaling 1 meter to 1 blitz unit. (I would use this for an RPG or FPS but of course it depends on the style of game.)