After effects , Premiere kind of programs goal is to make videos . So you have to choose FPS .
In a 3D application you choose all the parameters.
If they have a previewer or some camera settings you choose the frames per second there and can control your animation accordingly.
If you use PAL and want to make a camera pan from left to right in 1 second you put the last keyframe on the 25th frame.
With NTSC 30 etc. If you want to last the pan 2 seconds you make them 50 or 60 accordingly.
In Lightwave it is a percentage like in TG2(i think).
Actually in real life with a camera they are kinda the same.
It is the difference between frames the camera and-or the objects are moved + the shutter speed.
Because using a 3d animation program is actually independent of the FPS used by a camera (you can use whatever you want) they use a percentage between the first and the next frame.
It depends on shutter speed the shooting speed(FPS)like in an normal camera.
I mostly use very small percentage of motion blur if any.
It is not natural as it seem at first if you ask me.
Because when you look at a fast moving object that goes from left to right with your eye and with an camera there is not a problem at first.
But when you look at the surrounding part at the video after the shoot all is blurred.
If you look at the surrounding as the object goes from left to right (in real life) you can see it without blur ,basically it depend where you look at the moment.
But in a picture you can look where you want. You are not restricted to the focused parts.
Not sure if this makes sense.
There are probably better explanations somewhere on the net and some of our friends here could make it more comprehensible i am sure.
One of the reasons i do not like it , is, it is used as a cheap method to hide bad parts in cgi , comping . Especially on tv .
You can be sure wherever you see high motion blur or better said plenty blur they are hiding bad and or cheap VFX .
I used it too in the same way for some basic work that wasn't as good as i liked
I really want to see those 48 - 60 frames movies .
After so much years lesser motion blur hopefully .
As you guys talked about this 48 FPS situation here it may bring some different things with it.
But i made some tests years ago as my computer at those times could barely play them and i liked them .
I want crystal clear images