Making Prop Swirls
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Posted 1/30/09 , edited 1/30/09
For this example I'll be working on a 150 pixel square canvas. The first step is to use the rectangular selection tool to divide the canvas roughly in half, so that in my example the entire lower half of the canvas is selected. Fill this with your color of choice, red is shown here.

Now from the menu select Filters / Distorts / IWarp, and take a look at the dialog box that pops up. Using the 'Deform Mode' radio buttons, you can choose either a clockwise or counter clockwise spin. The two sliders below titled 'Deform Radius' and 'Deform Amount' control the action of the plugin. Since I want my entire canvas area affected by the swirl, I've set 'Deform Radius' to 100. I've chosen a middle value for 'Deform Amount', but playing with this slider may give other interesting results.
Now with my settings in place, I place my mouse cursor directly over the center of the preview area in the plugin dialog, and begin clicking repeatedly in the same spot. With each click, a bit more swirl effect is introduced in the preview. When you are satisfied, click OK. Use the 'Reset' button to return the preview to it's original state and begin again.

Lastly, if you enable the 'Adaptive Supersample' tickbox, the sliders below will become active. These control the quality of the rendering for the final swirl art. The top slider 'Max Depth' controls the amount of supersampling that will be applied. The lower slider entitled 'Threshold' will vary the supersampling based on the image data. Adjust these to preference, but be aware that high 'Max Depth' values, along with a low 'Threshold' value can lead to much longer processing times (though often with much better smoothness). Here is the swirl at supersampling maximum settings:

Finally, if you wish to simulate a motion blur on a rotating prop hub, you can use the Filter / Blur / Motion Blur filter for this effect. Here you can see the settings I've chosen, as well as the results.



Taken from GIMP Tutorials
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Posted 5/28/09 , edited 5/29/09

kurai_tsuki92 wrote:

lol... sorrry to rouble you again but what do i do after this again??? i m kind of lost... n wat do u mean by plugin dialog???



Under Deform Mode, click SwirlCCW
then set the Deform radius to 100
and set the Deform amount 0.50

after that on the area where it shows the preview, click on the area where you want the swirl to be, and keep clicking in that same place until you like how it looks.

WARNING:make sure to click near the border of the colors, or else it'll turn into a blob.

Done, and if you want to add the blur go ahead.
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Posted 5/30/09 , edited 5/30/09

JunK_aDdiCtOr wrote:


kurai_tsuki92 wrote:

lol... sorrry to rouble you again but what do i do after this again??? i m kind of lost... n wat do u mean by plugin dialog???



Under Deform Mode, click SwirlCCW
then set the Deform radius to 100
and set the Deform amount 0.50

after that on the area where it shows the preview, click on the area where you want the swirl to be, and keep clicking in that same place until you like how it looks.

WARNING:make sure to click near the border of the colors, or else it'll turn into a blob.

Done, and if you want to add the blur go ahead.


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Posted 5/30/09

kurai_tsuki92 wrote:

For this example I'll be working on a 150 pixel square canvas. The first step is to use the rectangular selection tool to divide the canvas roughly in half, so that in my example the entire lower half of the canvas is selected. Fill this with your color of choice, red is shown here.

Now from the menu select Filters / Distorts / IWarp, and take a look at the dialog box that pops up. Using the 'Deform Mode' radio buttons, you can choose either a clockwise or counter clockwise spin. The two sliders below titled 'Deform Radius' and 'Deform Amount' control the action of the plugin. Since I want my entire canvas area affected by the swirl, I've set 'Deform Radius' to 100. I've chosen a middle value for 'Deform Amount', but playing with this slider may give other interesting results.
Now with my settings in place, I place my mouse cursor directly over the center of the preview area in the plugin dialog, and begin clicking repeatedly in the same spot. With each click, a bit more swirl effect is introduced in the preview. When you are satisfied, click OK. Use the 'Reset' button to return the preview to it's original state and begin again.

Lastly, if you enable the 'Adaptive Supersample' tickbox, the sliders below will become active. These control the quality of the rendering for the final swirl art. The top slider 'Max Depth' controls the amount of supersampling that will be applied. The lower slider entitled 'Threshold' will vary the supersampling based on the image data. Adjust these to preference, but be aware that high 'Max Depth' values, along with a low 'Threshold' value can lead to much longer processing times (though often with much better smoothness). Here is the swirl at supersampling maximum settings:

Finally, if you wish to simulate a motion blur on a rotating prop hub, you can use the Filter / Blur / Motion Blur filter for this effect. Here you can see the settings I've chosen, as well as the results.



Taken from GIMP Tutorials


hmph... i did do jus as u said ....i kept clicking in da centre of the preview but still it did not change at all... it stayed da same....
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Posted 5/30/09

JunK_aDdiCtOr wrote:

hmph... i did do jus as u said ....i kept clicking in da centre of the preview but still it did not change at all... it stayed da same....


Did you repeatedly click the area, where you wanted the swirl?
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Posted 5/31/09

kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:

hmph... i did do jus as u said ....i kept clicking in da centre of the preview but still it did not change at all... it stayed da same....


Did you repeatedly click the area, where you wanted the swirl?


yes i did.... but it didn't have nay effect??

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Posted 6/4/09

JunK_aDdiCtOr wrote:


kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:

hmph... i did do jus as u said ....i kept clicking in da centre of the preview but still it did not change at all... it stayed da same....


Did you repeatedly click the area, where you wanted the swirl?


yes i did.... but it didn't have nay effect??



Hmm....did you do everything correctly? like the settings?
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Posted 6/4/09 , edited 6/4/09

kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:


kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:

hmph... i did do jus as u said ....i kept clicking in da centre of the preview but still it did not change at all... it stayed da same....


Did you repeatedly click the area, where you wanted the swirl?


yes i did.... but it didn't have nay effect??



Hmm....did you do everything correctly? like the settings?


Yup Yup i carefully applied all da steps dat was required... T_T

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Posted 6/4/09

JunK_aDdiCtOr wrote:

Hmm....did you do everything correctly? like the settings?


Yup Yup i carefully applied all da steps dat was required... T_T



Okay. Try doing it again, and click on the preview in the box..Let me know if it works this time.

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Posted 6/4/09

kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:

Hmm....did you do everything correctly? like the settings?


Yup Yup i carefully applied all da steps dat was required... T_T



Okay. Try doing it again, and click on the preview in the box..Let me know if it works this time.



okz.....>..<

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Posted 6/6/09

kurai_tsuki92 wrote:


JunK_aDdiCtOr wrote:

Hmm....did you do everything correctly? like the settings?


Yup Yup i carefully applied all da steps dat was required... T_T



Okay. Try doing it again, and click on the preview in the box..Let me know if it works this time.



T_T i tried again but still no effect?? i dun get it??

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Posted 6/6/09


Can you show me what you're doing?
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Posted 6/7/09

kurai_tsuki92 wrote:



Can you show me what you're doing?



wat do u mean lyke... show my each and every step??
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Posted 6/8/09

JunK_aDdiCtOr wrote:


kurai_tsuki92 wrote:



Can you show me what you're doing?



wat do u mean lyke... show my each and every step??


just the main steps, up till where you have to click the preview box to make it swirl. just use print screen. the key on your keyboard should say Prt Scr/SysRq
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