To Uwe: alpha channel

[Otto]

Hello Uwe,
would you be so kind to explain me once again how to create an alpha channel bmp.
Maybe you can point out what I did wrong with these to bmps.

http://www.atzwanger-software.com/fw/bmpMetro.zip

Thanks in advance
Otto

[ukoenig]

Hello Otto,
The PNG's have a Alphachannel, but they are NOT Transparent.
You can open them with Pixelformer,
next select a transparent Brush and fill the white Area.
I think GIMP includes a Function as well, to replace a defined Color with TRANSPARENT.
I will check it out.

my Tests :

Your Original :



Replaced the white Background with TRANSPARENT :



Best Regards
Uwe

[Otto]

Hello Uwe,
Thank you very much.
Where do I find a transparent brush in pixelformer.
Thanks in advance
Otto

[ukoenig]

Hello Otto,

select any Color, than move the Colorslider to the BOTTOM.
Transparent is used.



Best Regards
Uwe

[Otto]

Hello Uwe,
thank you for your help. Now I have the bmps transparent.
Best regards,
Otto

[hua]

Some of Uwe's tutorials are listed at http://wiki.fivetechsoft.com/doku.php?id=graphics