[tom]

okay, but then be acurate to the real world

real world? ... maybe cameras and films cannot be this sensitive physically but if it's for real life, there are teorically correct situations which we cannot handle with the actual tecnology but they are happening and they are real

[tom]

Thank you Albert, please also consider following situation:
But for now, I just wonder how many frames do you care to define 1 sec?

Let's make it clear:

- Imagine I have a 25 frame scene at 25 fps, this will play 1 sec you know.
- Imagine I set a location keyframe at the first and the last frame for an object moving 1 meter distance.
- Imagine my maxwell camera shutter speed is 1/1 (1 per sec).

This must be causing full motion blur from start to end!

Furthermore, if I change animation settings from 25 fps to 50 fps without resizing the keyframes
with keeping the shutterspeed intact, the resulting motion blur must be affected due to change of animaton timebase.

[tom]

i don't have time for this..it's not a technical limitation of cameras..its how cameras work..read it in the american cinematographers manual or in jon fauers arri 35 book or in david w samuelsons motion picture camera data..or ask jep..he works in the industry..or stick to max and glass

i'm impressed really

[Mihai]

Well, this thread makes me ask the question: Is the Maxwell camera a still camera, or a film camera? Why can't we have both?

[Julien Confalonierie]

I think the "problem" is that the 2 subframes Motion Blur is calculated by Maxwell based on the camera's shutter speed.
Example: If you put a shutter speed of 1 sec, Maxwell understand that one frame is 1 sec and will not take into account the timeline fps. So if you have an animation of a ball for 25 frames at 25 fps on a cuved path, a 1 sec shutter speed for Maxwell camera and that you "take your shot" at frame 0, you will have a straight line between the position of the ball at frame 0 and the position at frame 25. Now if you change your fps to 50 without resizing your animation (i.e 25 frames for the movement) you will have the same result because of the only 2 subframes that won't be enough to accentuate the static ball from frame 25 to 50, even if I think that Maxwell interpets that its a 50 fps motion (but Albert said they will test). For the maxwell camera with a shutter speed of 1 sec, 25 frames in that case would represent 1/2 sec.
Now the only limitation is the subframes number. With more subframes, we could make some curved motion blur or accentuate moving objects when they stop moving...
Also tom you just have to match or not the shutter speed of the maxwell camera when you have a 25 fps or a 50 fps animation (i.e 1/25 or 1/50).

Well these are the results of my tests, please correct me if I'm wrong.

[hdesbois]

i mean when i set the scene 25 fps or 30 fps, motion blur must be affected... but it's not...

Hmm, maybe I get it : are saying that because the time interval between 2 frames is shorter, so is you motion, so if you switch from 25 to 30, the motion blur should decrease?
I'm not sure. I would say that for a given motion, motion blur depends only on shutter speed, that is, on the length of your motion during the time while the shutter is open, not interframe motion. But then, the lenght of the interframe motion is used as a reference to calculate the lenght of the motion during aperture, so if Maxwell can't read the Max or LW FPS right, the blur won't be correct. Now, suppose MW internal fps is fixed an is, say, 25. You render a one second animation keyed at 25 fps. Then you change your mind, and render again at 30. If MW fps is still 25, it will render as a 1.2 second animation, with a bit less motion blur, right?
So, if you don't see any change, maybe after all Maxwell is reading FPS setting. If the shutter speed is the same, so goes the mb? Or am i wrong? I'm getting a headache over this one.
HD

[Julien Confalonierie]

Well, Maxwell have a fps parameter (look at the SDK) which is there only for matching your animation fps (whatever your app, 3DS, Maya, I think it's done automatically by the plug-ins...). It's only there for the ratio time/distance, but not for the motion blur which is calculated based on the maxwell camera's shutter speed.

[tom]

[tom]

i'm on the floor i say nothing more....

[tom]

carmen, is it really hard to understand what i say or i'm really bad about english.
honey,
i need my motion blur to be affected when i change the fps but not resize the frames at any shutter
that is all and this is not so hard to tell

[Mihai]

if you want 1minute exposure time, in real world, the fastest you could shoot is 1 frame per minute..now projected at 24fps..everything would be accelerated..this is called timelapse

This statement is confusing I think carmen because first you mention 1 minute exposure time, then you say you would shoot 1 frame per minute, but that could imply you just take one picture every minute, but when you take that picture it could be exposed for say 1/60th of a second.

This would give you timelapse wouldn't it? But if you instead shoot at 1 frame/minute AND keep it exposed during that whole minute, all you would get when you played back those frames would be a blur, not timelapse.

[tom]

Tom is jumping up and down now...
YUPPPIIII... Mihai got what I say! Thanx bro!

[tom]

oh it is not impossible in real life! what do you think happening when you set your camera to B mode and keep pressing the button for seconds?
holding shutter and releasing it when done... manual!

[tom]

your last post is strange now I DEFINITELY UNDERSTAND NOTHING!

[tom]

while i'm reading the book you're mentioned.... render and send me the following animation.

- draw the word "carmen" from a spline in handscript... (continuous i mean)
- key an emitter ball from start to end.
- set any setting you learned from the books
- render and have your mblur name written on output
- send it here and teach me how

i give you 48hours, if you won't back in here with this, take your books back... all right?

this is open for any volunteer