How does one create prop blurs?

anthsco

Some aircraft models come with blurred props but some dont.

I know there is a motion blur in the render settings...how does one create prop blurs in Daz?

SimonJM

At the risk of sounding facetious you can use the Motion Blur setting. That pre-supposes the props permit rotation. If so, then it's a 'simple' matter of:
Create scene.
Go to Poses and put animate track onto frame 1.
Rotate the prop(s) you wish to have motion blur - I'd recommend (as a vague rule of thumb) going for about 270 degrees
Got back to frame 0
In Render Settings, select advanced tab
Check 'Motion Blur' and adjust Motions Samples and Motion Amount to acceptable values - and that's the trick, trying to find what is right. Again, as a wild vague guess try 4 or 6 Motion Samples and 75% Motion Amount.

A tip here - use the Spot Render tool here to check what the settings will do. Rinse, repeat until looks good.

kaotkbliss

anthsco said:

Some aircraft models come with blurred props but some dont.

I know there is a motion blur in the render settings...how does one create prop blurs in Daz?

My guess is the creator made a circle, then modeled in various positions of the propeller blade, then set different areas of the circle to different levels of opacity for the spinning/ghosting effect.

*edit*
spelling

Richard Haseltine

In general such things are a flat plane with a motion-blurred image and opacity map applied, either actual motion blur or just something painted to look like it.

kaotkbliss

Ahh, hadn't thought of that route. Much simpler than modeling the whole thing. lol

Limun

SimonJM said:

At the risk of sounding facetious you can use the Motion Blur setting. That pre-supposes the props permit rotation. If so, then it's a 'simple' matter of:
Create scene.
Go to Poses and put animate track onto frame 1.
Rotate the prop(s) you wish to have motion blur - I'd recommend (as a vague rule of thumb) going for about 270 degrees
Got back to frame 0
In Render Settings, select advanced tab
Check 'Motion Blur' and adjust Motions Samples and Motion Amount to acceptable values - and that's the trick, trying to find what is right. Again, as a wild vague guess try 4 or 6 Motion Samples and 75% Motion Amount.

A tip here - use the Spot Render tool here to check what the settings will do. Rinse, repeat until looks good.

any idea how to do this in iRay Render Settings ?
Thanks

sriesch

If the props that come with a model don't rotate, another option would be to hide them, then find a reasonable substitute stand-alone propeller model and add that one to the scene, which can then be rotated to get the prop blur.

SixDs

Another alternative would be to kitbash and simply use the prop planes prepared for another model. You can scale as necessary, but may need to do some hunting to ensure that it is a two, three or four-bladed prop as the model requires.

Crow Hammer

I tried something different. I duplicated the prop, and changed the wight scale, then spun them. I selected them all, and brought down the opacity. Kindof worked, better than nothing

DrunkMonkeyProductions

Limun said:

 

SimonJM said:

At the risk of sounding facetious you can use the Motion Blur setting. That pre-supposes the props permit rotation. If so, then it's a 'simple' matter of:
Create scene.
Go to Poses and put animate track onto frame 1.
Rotate the prop(s) you wish to have motion blur - I'd recommend (as a vague rule of thumb) going for about 270 degrees
Got back to frame 0
In Render Settings, select advanced tab
Check 'Motion Blur' and adjust Motions Samples and Motion Amount to acceptable values - and that's the trick, trying to find what is right. Again, as a wild vague guess try 4 or 6 Motion Samples and 75% Motion Amount.

 

A tip here - use the Spot Render tool here to check what the settings will do. Rinse, repeat until looks good.

 

any idea how to do this in iRay Render Settings ?
Thanks

motion blur doesn't exist in this implementation of iray, but there is a script for it.

http://www.daz3d.com/motion-blur-for-iray

haven't tested it myself so i can't comment on it's useability.

 

Deke

I render in Iray and then add motion blur in After Effects with either CC Force Motion Blur or Pixel Motion Blur.

anthsco

Many models already have propellors that hae been blurred and set up as props that can be parented to the model. Like the F4U duo in the render below. My question stemmed from having to create a prop blur in Daz from a motionless propellor without having to exit Daz. That was splendidly answered in the seond or third post. :)