Photoshop Motion Blurring Help
Photoshop Motion Blurring Help
Author
Discussion

Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
I've been trying to apply motion blur to various cars in Photoshop, but for some reason i'm getting this ghosting. Tried using a duplicate layer to do the blur but this doesn't work. What am i doing wrong?



Thanks.

Simpo Two

92,708 posts

294 months

Monday 17th September 2012
quotequote all
Layer opacity not 100% and/or selection tool has feathering?

4Lmike

1,910 posts

199 months

Monday 17th September 2012
quotequote all
It's because when you use motion blur it essentially stretches the whole picture, including the car. So the blurred edges of the car overlap with the background. Try making a selection before applying the blur ( this may or may not work, not tried it myself).

RobDickinson

31,343 posts

283 months

Monday 17th September 2012
quotequote all
Select the car with smart wand or whatever

Copy car to new layer.

Reselect + Invert selection.

Copy to new layer.

Motion blur that layer.

Shift car layer to top of pile.

Edited by RobDickinson on Monday 17th September 09:25

RobDickinson

31,343 posts

283 months

Monday 17th September 2012
quotequote all
post up an undoctored pic and I will do /show layers

Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
RobDickinson said:
Select the car with smart wand or whatever

Copy car to new layer.

Reselect + Invert selection.

Copy to new layer.

Motion blur that layer.

Shift car layer to top of pile.

Edited by RobDickinson on Monday 17th September 09:25
When i go to do the invert part the old selection gets deleted?!

RobDickinson

31,343 posts

283 months

Monday 17th September 2012
quotequote all
Rob282828 said:
When i go to do the invert part the old selection gets deleted?!
Reselect the base layer.

Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
RobDickinson said:
Reselect the base layer.
That's not working... frown

RobDickinson

31,343 posts

283 months

Monday 17th September 2012
quotequote all
post up the pic undoctored

Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all

Simpo Two

92,708 posts

294 months

Monday 17th September 2012
quotequote all
I see the problem now. Just take it again with a slower shutter speed nuts

Pixel Pusher

10,412 posts

188 months

Monday 17th September 2012
quotequote all
Try this.

Put a path around just the back end of the car. Save the path.

Copy and "paste in place" that rear section.

Apply motion blur as desired.

Then re make the selction from the path you made and apply that to a layer mask on the blurred layer.

You get this.






If you want to spin the wheels as well, cut them out individually onto separate layers, transform them individually to get them back to almost circular, then apply the radial blur and then re transform them back to eliptical to fit the car.

PP.

ETA, sorry, didn't realise your background was static as well.

The solution is closer in that case to what Rob has said.


Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
Pixel Pusher said:
Try this.

Save the path.
This could be the solution! However i don't think my version supports path saving. I'm running Photoshop Elements 6...

RobDickinson

31,343 posts

283 months

Monday 17th September 2012
quotequote all


1. Select car with your fav tool.
copy, past - top layer (a)

2. back to background layer.
Select _> reselect
select -> inverse
copy, paste - middle layer (b)

3. select new (b) layer
motion blur.

Job done ( added wheel blur and contrast).


Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
RobDickinson said:


1. Select car with your fav tool.
copy, past - top layer (a)

2. back to background layer.
Select _> reselect
select -> inverse
copy, paste - middle layer (b)

3. select new (b) layer
motion blur.

Job done ( added wheel blur and contrast).

Yay! It's working, my very quick attempt in Photoshop just now...



Thank you Rob! Problem solved! beer

Well done for all the effort you put into doing that, and bonus points for how quickly too. smile

Pixel Pusher

10,412 posts

188 months

Monday 17th September 2012
quotequote all
I got this far.

Pretty much as Rob has done with the entire car on a layer with the background blurred.

Then use the clone tool to eliminate the forward blur. Layer masks to show the background blur layer through the open windows and wheels spun individually.

I'll try to PM you the PSD rather than go into a long list here.


Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
Thanks to Pixel Pusher, Simpo Two and Mike as well! thumbup

AndWhyNot

2,359 posts

228 months

Monday 17th September 2012
quotequote all
New layer from background: Blur > Motion Blur > -10º & 30px
New layer from background: Blur > Motion Blur > -10º & 150px

Mask out the car one layer at a time using the same technique of eraser and large, soft-edged brush strokes (I do 90% of my layer blending like this rather than any selection tool)

A better result than this would be easier with a bigger original and a bit more attention to detail on my part. If the original is a different size you might need to adjust the blur strength.


Rob282828

Original Poster:

2,393 posts

178 months

Monday 17th September 2012
quotequote all
Pixel Pusher said:
I got this far.

Pretty much as Rob has done with the entire car on a layer with the background blurred.

Then use the clone tool to eliminate the forward blur. Layer masks to show the background blur layer through the open windows and wheels spun individually.

I'll try to PM you the PSD rather than go into a long list here.

That's brilliant, you are an absolute master at Photoshop! Do you do any work professionally or is it just a hobby? There's always great contributions from you on the other threads. biggrin

Pixel Pusher

10,412 posts

188 months

Monday 17th September 2012
quotequote all
Rob282828 said:
That's brilliant, you are an absolute master at Photoshop! Do you do any work professionally or is it just a hobby? There's always great contributions from you on the other threads. biggrin
You're very kind, thank you.

Used to do it "properly", now I manage our studio of retouchers who are vastly better than I am, but every now and then I'll give it a go.

thumbup