Wheel Blur on moving cars

Mikebert4

Mikebert4

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Mike Beaton
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Ok, so Chris D asked me too look at some of his pre-season F1 shots and add some motion to them.

Adding motion to the background is nice and easy, and I've checked that box now, but adding a realistic spin to the wheels is evading me.

I've tried cutting the sidewall of a wheel off to a new layer and using the radial blur tool - but the cars aren't flat-on to the camera so I'm getting perspective issues. It's bad enough having to centre each tire on the page for the radial blur filter to work it's proper magic...

Simply put, I'm fairly at a loss. :bang:

Anyone know how to go about this kinda 'shop?

Thanks in advance!
M
 
Try making a selection around the wheel or tyre. This will limit the area of blur. I tend to use the pen tool for this. Now apply the Radial Blur.

You may find it's easier to to copy the background layer and work on the copy. Then using a mask paint through to the background layer. If you still have small perspective problems select the wheel as before ( Saving the selection helps ) then use free transform to make the effect look realistic.

It's not easy, but gets better the more you do it. Problem is I do this once every blue moon and have to relearn it over again. Don't add to much Radial Blur on as it makes the image look gritty. You may find thst you need to apply slightly different amounts of blur to rim and tyre to get a realistic effect
 
Chappers said:
Try making a selection around the wheel or tyre. This will limit the area of blur. I tend to use the pen tool for this. Now apply the Radial Blur.

You may find it's easier to to copy the background layer and work on the copy. Then using a mask paint through to the background layer. If you still have small perspective problems select the wheel as before ( Saving the selection helps ) then use free transform to make the effect look realistic.

It's not easy, but gets better the more you do it. Problem is I do this once every blue moon and have to relearn it over again. Don't add to much Radial Blur on as it makes the image look gritty. You may find thst you need to apply slightly different amounts of blur to rim and tyre to get a realistic effect
Click to expand...

Thanks for the advice, :thumbs:

I've been working on rim/tire masked layers and I'm -almost- getting the effect I want, certainly it'll do for anything up to long side 800px, but I'm being fussy :p

I'm also finding that several blurred layers (with an added 3-4x rotation between them) at varying opacity seems to work quite nicely...

I'll have another attack at it now and post my results :) Does anyone know a good trick to doing this, or is it always a grind?
 
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