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 Post subject: Creating a realistic gear in GIMP
PostPosted: Thu Jul 08, 2010 9:38 pm  (#1) 
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Making a realistic looking gear in GIMP.
I saw this done in Photo-Shop by Designs By Mark, and decided to try it in GIMP. =)
Please be sure to name each layer what i tell you because it will matter later in the tutorial.

1) Open GIMP.I'm using 2.6.8 stable version.
2) Create a new file 450x450/with a white background.

Before we go on to step 3 we need to set up our grid at 25px/set it to view, and snap to.

3) Make a new transparent layer call it gear teeth.
4) Make a fixed rectangular selection 250 (height) x 30 (width).
5) center the selection horizontally and vertically in the image.Fill it with black.
6) select/none
7) Copy the gear teeth layer 5 times.
8) Select gear teeth copy and rotate the layer 30%
9) Select gear teeth copy#1 and rotate the layer 60%
10) Select gear teeth copy#2 and rotate the layer 90%
11) Select gear teeth copy#3 and rotate the layer 120%
12) Select gear teeth copy#4 and rotate the layer -30%
13) Make a new transparent layer name it gear center.
14) Create a circle fixed 200x200 snap it to center and fill with black.
15) Go to Edit/copy visible/Edit/Paste as new layer.Or if you have the script installed select
Edit/copy visible and paste as layer.Name the new layer Gear.
16) Select the Gear layer and go to colors/invert.You should now have a white gear on a black
background, and that's just what we need for the next step.
17) Select the Gear layer go to Filters/blur/Gaussian blur, and blur at 25.
18) Select the Gear layer again and go to colors/levels, and put in these settings for output.
Image
If all is well it should look like this now.
Image


19) Turn off (make invisible) all the layers except Background layer and the top Gear layer.

21) download my brushed steel pattern or create your own with dif clouds and noise and radial blur.
Trust me its easier to use the one i already have done...lol.
Image
22) Open the pattern as an image go to select all/copy - open your gear xcf and edit/paste as new layer.
Make sure its now the top layer.Name it textured steel.
23) Select the textured steel layer and center it in the image exactly in the middle with the arrow keys
on your keyboard.
24) Now is a good time to save it as Gear.xcf if you haven't already.Remember to save often from here
on out.
25) Make a new layer name it outer rim.Create a circle selection fixed 200x200 and snap it to center.
Fill it with white.
26) Keep it selected and select your gradients tool and make sure its set to foreground to background.
White (FG) and Black (BG) as colors.Make a gradient from top to bottom of the circle selection.
27) NEW layer name it inner rim, create a 150x150 circle fixed snap to center fill with white, and do the
same gradient but this time bottom to top.Select/none.
28) Make a new circle fixed 50x50, select the inner rim layer.
center and hit delete, select outer rim layer hit delete, select textured steel layer hit delete.Select/none.
29) Make the inner, outer rim and textured steel layers invisible.
30) Now select the Gear layer, select fuzzy select tool and click on the black color.Select/grow by 4 px.
Select the textured steel layer (make it viable) and hit delete on your keyboard.Select/none.
31) Make the Gear layer invisible.Select the inner rim layer and merge it down with outer rim layer.
Select the textured steel layer/right click and select alpha to selection.Select the outer rim layer / select
invert /hit your delete key on your keyboard.Select/none.
32) Select the outer rim layer set that layer mode to Grain Extract.Merge the outer rim layer down with the
textured steel layer rename the layer Gear main Go to view/show grid, and turn off the grid.


33) If all is well still it should look like this.
Image
27) Now we can add some other effects like textures and a bevel to our gear, or it looks pretty good like it is.
We can however make it better.
28) Go to script-fu/layer effects/bevel and emboss, or if you use Python, go to layers/layer effects/bevel and emboss.put in
these settings.
Image

29) now download this rust pattern
Image

(or use your own), and open as a new image/ select all edit/copy
open gear.xcf and edit/paste as new layer.Center that layer of rust where you want it.
Just so long as it covers our gear. =)

Now comes the magic! ... select our Gear Main layer, then right click/alpha to selection
Select our top rust layer, select/invert/hit the delete key on your keyboard.
set the layer mode for our rust layer to darken only...voila A realistic gear made in GIMP! =)
Now select the Gear main layer and add yourself a drop shadow of your liking.
Image



I hope you enjoyed the tutorial.

finished image...
Image

thanks for checking it out.
If you want the xcf just PM me

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Thu Jul 08, 2010 9:46 pm  (#2) 
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This is what your layer order should look like when your done. =)

Image

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Fri Jul 09, 2010 4:30 am  (#3) 
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Thanks, my wife has been wanting me to draw her some steampunk based patterns, I planned to draw them in a cad program then finish them with Gimp. This will make it look better.

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Fri Jul 09, 2010 11:24 am  (#4) 
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Rod, that is most cool. Thanks for the great tutorial! :tyspin

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Fri Jul 09, 2010 2:44 pm  (#5) 
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You are welcome, and i am glad you enjoyed the tutorial.I just hope it can be of some use to folks.

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Sat Jul 10, 2010 12:13 pm  (#6) 
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This was an intriguing tutorial. I enjoyed doing it and adding my own touch to it. I made a corroded brass gear and used an image of a corroded coin to make the corrosion on the gear.

Image

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Sat Jul 10, 2010 1:05 pm  (#7) 
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DAMN, Thats awesome!

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Sat Jul 10, 2010 2:14 pm  (#8) 
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Oregonian wrote:
This was an intriguing tutorial. I enjoyed doing it and adding my own touch to it. I made a corroded brass gear and used an image of a corroded coin to make the corrosion on the gear.

Image


That looks really cool O! =)

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 8:37 am  (#9) 
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Excellent Tutorial. So descriptive a Newbie can do it.

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 10:26 am  (#10) 
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This is a phenominal tutorial! I love the variations everyone has been coming up with! Especially the eagle! (I collect eagle figurines) These are sweeeet!

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 11:05 am  (#11) 
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I have that same brushed steel pattern, I use it frequently but didn't know you made it. Small world, this is a nice tutorial BTW, I plan to fool around with it later.

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 11:15 am  (#12) 
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Here's my first shot, made with my own steel layer. It's ok, but I'll get it better the nest time. I did add some depth using the 3DiFy script.


Attachments:
Gear Tutorial.jpg
Gear Tutorial.jpg [ 137.13 KiB | Viewed 4972 times ]

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 12:20 pm  (#13) 
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PhotoMaster wrote:
Here's my first shot, made with my own steel layer.
I really like the brushed look to it.

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 6:21 pm  (#14) 
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I liked the Double Eagle but it seemed to eliminate the depth of the image, so ...

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 6:42 pm  (#15) 
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Excellent Mike. You need to take better care of your tools, though. :tehe

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 6:58 pm  (#16) 
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Oregonian wrote:
Excellent Mike. You need to take better care of your tools, though. :tehe


I felt the image should be a reflection of its creator. I have four children, two teenage girls and four and three year old boys. On second thought, perhaps I should have created it with a few teeth missing to be more reflective of its creator. :rofl


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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 9:48 pm  (#17) 
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Then, again, you might not have even been able to find it. :smiley2

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Tue Aug 31, 2010 10:18 pm  (#18) 
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I never thought to use the 3DIFY script for depth on anything other than text, nice thinking PhotoMaster. =)
Another 3D script just hit the scene (3D Text),and you can dl it here, it is alot like Saulgoodes..
http://registry.gimp.org/node/24671

Wow!... how long have you had the brushed steel image, i created it in Photo-Shop and only put it online when i made this tutorial. I used the noise, and radial blur filters to create it, the image would be dif for anyone else.

You can create the same effect in Gimp, but the radial blur in Photo Shop (God forgive me),is something i just can not live without ... lol

here it is i created it again in PS:this is without the dodge to create the highlights...quick render so not as detailed plus no unsharp mask. =)
Image


To create it in Gimp you have to make a clouds layer, then noise, then Filters/Blur/Motion blur/choose radial and set the angle to 45% or so.....you have to get the noise just right in Gimp though or it renders cloudy looking.

Where did you dl it from, do you remember?

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Wed Sep 01, 2010 12:42 pm  (#19) 
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Another one with a few extra layers:

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 Post subject: Re: Creating a realistic gear in GIMP
PostPosted: Sun Oct 03, 2010 9:26 am  (#20) 
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Rod, a very nice tutorial. Here is my try. I do not have all my filters in place yet as I had a hard disk failure and I am still installing stuff, so no nice bevels! I tried to make my own circular brushed metal image , but I had trouble with the highlights. I tried with noise and radial motion blur with diagonal black/white stripes and/or conical/square gradients and while they approach your effort they just do not measure up to your example. So I would love to know how you did that circular brushed metal effect.
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Wbool63

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