6 Replies Latest reply on Mar 25, 2013 10:32 AM by Steve Fairbairn

3D Concave Effect to Achieve Hollow-Donut Look

Chief Tarun Mar 24, 2013 4:40 PM

I am trying to achieve a 3D hollowed-out effect to get a tube or empty donut look. This is the file that I am working on. The intended effect is a 3D quarter pipe that looks hollow and concave, so that it's caving indwards away from the viewer. As you can see, it's not perfect because I am only using 2D shapes with gradients and inner glow effects. Is there a way to create a realistic and authentic concave look for this hollow pipe/cylinder in Illustrator CS5? Thanks!

1. Re: 3D Concave Effect to Achieve Hollow-Donut Look

JETalmage Mar 24, 2013 7:31 PM (in response to Chief Tarun)

Are you talking about something like this?:

JET
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2. Re: 3D Concave Effect to Achieve Hollow-Donut Look

Chief Tarun Mar 24, 2013 10:38 PM (in response to JETalmage)

Yes, this is pretty much what I am looking for. Except how would I make it in the shape of a perfect quarter-circle? Because this is for an iPhone game, and it's supposed to be in the bottom right hand corner of the screen with the edges of the pipe touching the screen edges. So how can I make the pipe do that? Again thanks for the help!
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3. Re: 3D Concave Effect to Achieve Hollow-Donut Look

Steve Fairbairn Mar 25, 2013 1:59 AM (in response to Chief Tarun)

See also this thread, post #11
http://forums.adobe.com/thread/1175522?tstart=0

You just move the light stroke as you wish to control the ‘lighting’.
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4. Re: 3D Concave Effect to Achieve Hollow-Donut Look

JETalmage Mar 25, 2013 5:14 AM (in response to Chief Tarun)

…how would I make it in the shape of a perfect quarter-circle? … it's supposed to be in the bottom right hand corner…
It is a quarter circle (90°). Just orient it that way in the 3D Effect dialog.

JET
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5. Re: 3D Concave Effect to Achieve Hollow-Donut Look

Barbara Ash Mar 25, 2013 9:40 AM (in response to Chief Tarun)

I fiddled around with the settings in the 3D dialog box and came up with this (see scree shot of dialog box and result below). Is this what you need?
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6. Re: 3D Concave Effect to Achieve Hollow-Donut Look

Steve Fairbairn Mar 25, 2013 10:32 AM (in response to Chief Tarun)

Try this for size:
This was done with the double stroke method.
Outer lines for pipe thickness done separately by outlining a copy of the thick line.
Then a clipping mask to cut the thing properly.
Note how you can control the lighting by offsetting the 2 paths.
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