Transparency help.

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Transparency help.

Unread postby >XaartaX< » 13 Sep 10, 12:28 am

So I've got this pic:
Image

And I'm trying to make the white background transparent. Downloaded Gimp and had a shot with some assistance from various transparency howto's on the net (just google for 'transparency gimp').

Made the background transparent but had a few problems. Got some white jaggies around the edges of the firefox and the shadowing around the firefox's feet was partially matched during the 'transparency process' (the transparency incorrectly matched some of the white or something in the grey shadow colour - making a real hack job of it).

Anyone got any pointers?

(I'd upload what I managed to produce but not on my machine with gimp atm - I'll try to remember to upload it later).
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Re: Transparency help.

Unread postby Alighieri » 13 Sep 10, 7:06 am

With such odd gradients and white sections that aren't the background, you really need to do it manually.

Make use of layers also, the shadow can be extracted and placed in to another layer above the original which can then have a level of transparency applied to it. The top 3/4s of the image should be easy using a magic wand kind of tool with little tolerance and a small amount of smoothing.
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Re: Transparency help.

Unread postby McMacca » 14 Sep 10, 1:08 pm

This is just a quick shop, but it will be hard to get exactly right. As Alighieri said it will have to be a manual job, but if you using it on a white-ish background it should be fine, but any other colour and it looks pretty terrible.


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Re: Transparency help.

Unread postby Mr Spinks » 14 Sep 10, 3:08 pm

If you want it quick and use the magic tool..

Just contract the selection by 1 or 2 pixels and then feather it a little bit by 1 or 2 pixels. This will soften the jaggies when you place it on another colour.

If you want to do it the long way.. Learn the Pen Tool.
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Re: Transparency help.

Unread postby >XaartaX< » 15 Sep 10, 1:01 pm

Mr Spinks wrote:If you want it quick and use the magic tool..

Just contract the selection by 1 or 2 pixels and then feather it a little bit by 1 or 2 pixels. This will soften the jaggies when you place it on another colour.

If you want to do it the long way.. Learn the Pen Tool.
Ta for the tip + the others made by people above. I'll give it another shot this weekend hopefully.

I've got 0 experience beyond resizing/cropping in gimp/ps etc. So yer, fun times :) Should be able to figure it out with the above hints + google.
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