Re: [Gimp-user] Image diffenernt after saving

[Richard <strata_ranger hotmail com>]

Looks like  a classic case of "residual" alpha data (areas with less-than-full transparency) to me.  This is 
something you typically end up dealing with any time you use an automated tool to 'cut out' an image in GIMP 
because depending on what tools you're using to assemble your sprite later, they may or may not handle 
partial transparency properly.

What you should do (or at least what I'd do personally) is take the Eraser tool and start erasing around the 
vicinity of your object to ensure that the transparent areas around it really are 100% transparent.

Alternately, go to the Colors menu and select the "Levels..." option.  On the dialog that pops up you will be 
a dropdown with a list of color channels in the image (red/green/blue). Select "Alpha" from the dropdown and 
notice the histogram that appears in the chart.  Take the black end of the alpha range and drag it up the 
scale by a small amount -- this will wash out the alpha values of transparent areas to ensure that areas that 
look 100% transparent really ARE 100% transparent.

-- Stratadrake
strata_ranger hotmail com
--------------------
Numbers may not lie, but neither do they tell the whole truth.


> Date: Sat, 21 May 2016 23:18:22 +0200
> From: forums gimpusers com
> To: gimp-user-list gnome org
> CC: notifications gimpusers com
> Subject: [Gimp-user] Image diffenernt after saving
>
> I want to make a Piviot animation with sprites, what means I took a picture of
> myself, and cut the bodyparts out (legs, arms, head, chest) and wanted to put
> them together again, but the image slightly changed, what destroyed the
> tansperency (see image)
> Before I saved the background had the same color, but after saving not
> anymore...
> Thank you!
>
> Attachments:
> * http://www.gimpusers.com/system/attachments/247/original/Unbenannt.PNG
>
> -- 
> Silt (via www.gimpusers.com/forums)
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