TLDR version:
To give an estimate of priorities:
1st visible environment
2nd object motion blur -
It is very important for rendering artistic still images of figures in motion
then the rest whenever there is time.
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erik-nl wrote:In the mean time, someone would very much like to see object motion blur fixed.
DAZ users like myself may very well spend most of their render time on images featuring figures, but those figures don't always just quietly sit pretty looking into the camera, a lot of them are quite active!
A giant sword hacking away at a dragon might as well look as if it is moving at speed, and what about all those fancy post-whatever vehicles driving and flying about?
My own subject matter may generally be quite different from all that dramatic stuff, still I can't understand why so few people ask for this feature?
Erik
In December 2015 Face_off wrote that he would address object motion blur and all the other remaining issues after OctaneRender 3 was released.
I assumed that the
importance of Object Motion blur as an artistic tool even for rendering still images was acknowledged.
- Object Motion blur
Whilst there is a checkbox in the Animation tab for this, it appears to do nothing. So I'm not sure if it can be done or not. Regardless, because DAZStudio (and Poser) are predominantly used for figure rendered, object motion blur is not a lot of use - you really need vertex motion blur.
I do not properly understand the reasoning behind this statement.
Object Motion blur is extremely important for artistic renderings of figures in motion.
Choosing the proper shutter speed is a basic photography technique when capturing human subjects in motion.
Maybe part of the confusion is that there are several different names being used for motion blur effects.
Maybe computer graphics uses other terms than photography?
What exactly is Vertex Motion Blur?
In order to have a discussion about the importance maybe we first need to make sure we all mean the same when we use the terms object and camera motion blur.
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Let's look at a photograph of a moving train.
F stop was at 5
Exposure was 1 sec (Shutter speed)
This means the shutter of the camera was open for 1 second.
The image shows
- all the movement of the train during that 1 second.
AND
- the movement of the camera during that 1 second.
This distinction is important. The end result is caused by two different effects. Object Movement. Camera Movement.
Object Motion Blur
If an object is moving during the time the shutter of the camera is open you will notice this as a blur in the direction of the object movement.
-> This is the reason why we see a light streak and a blurred train.
If you wanted no blured movement you would have to reduce the time in which the shutter is open to a fraction of a second.
like: 1/250, 1/1000, 1/4000
It is an artistic choice if you want a completely sharp picture of a high speed movement
or
If you want to convey to the viewer of the image that there was movement be intentionally selecting a shutter speed that creates object motion blur.
- Object Motion blur at shutter speed 1/2500
Fast enough to have the man sharp in his running pose
still slow enough to have the water drops blurred to give the impression of water movement
The camera is fixed on a tripod.
Camera Motion Blur
Camera Motion Blur is caused by the movement of the camera even if the object is standing still.
In the train example the camera was hand held and therefore shacking a bit.
-> This is the reason why you see up and down movements in the light streak that follow the camera movement.
With Camera Motion Blur the only thing in the image that is sharp would be objects that move exactly at the same speed and the same direction as the camera.
Camera Motion Blur is mainly used as an artistic tool to simulate effects like an earth quake, an explosion, cheating in high speed action scenes.
Example: Punches not really hitting people are not that obvious when camera motion blur is used.
- Example of just camera motion blur:
The bottle is standing still. The only thing moving is the camera
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As far as I know Iray is able to simulate Object Motion blur.
But afaik DAZ Studio Iray still also does not support it (yet).
-> Maybe there is indeed a current limitation with the way DAZ Studio processes animated data that prevents object motion blur to be introduced?
Or maybe there simply was not enough time left to finish to implement Object Motion Blur in OcDS?
But in any case both on the DAZ Studio and the OctaneRender forum there are a lot of people waiting for Object Motion blur to be finally introduced so we can start to create artistic still images of figures in motion.
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