-alpha channels-

[DoubleDraGoN]

please explain alpha channels, my editor keeps crashing working with custom icons

 

[garion992]

if you use fotoshop
the white pixels are visible and the black not
Make sure you save it to 32 bit compresion TGA, then convert to BLP and import

 

[Uberplayer]

Actually, wc3 icons are 24-bit pictures.

 

[DoubleDraGoN]

can i do this in IRviewfan, and keep it as a tga file, im still confused of what alpha channels are, white+black pixels?

 

[garion992]

hmm i dont use IRviewfan, an Alpha Channel is just an extra layer over your image. If you make the layer 100% white it will show everything. If it's 100% black itwill show nothing.

Uberplayer: wc3 icons are 24-bit pictures
-> i thought if you want to save alpha channels you need to use 32 bits if you use Image Extractor to convert, maybe i am wrong.

 

[Choppa]

Alpha Channel: In graphics, a portion of each pixel’s data that is reserved for transparency information. 32-bit graphics systems contain four channels three 8-bit channels for red, green, and blue (RGB) and one 8-bit alpha channel. The alpha channel is really a mask that specifies how the pixel’s colors should be merged with another pixel when the two are overlaid, one on top of the other. An alpha channel is necessary for overlaying a graphic on top of another video or graphic source.

- http://www.channelstorm.com/Manual/Data/GL00/GL00.htm

Alpha Channel - Designed for creating depth in computer graphics, an alpha channel works like a key, choosing the opacity of all pixels in the image.

- http://www.ic.sunysb.edu/clubs/sbutv/glossary.htm

Information attached to each pixel that represents how that pixel is to be blended with background.

- www.digitalpostproduction.com/Htm/Features/DigitalVideoGlossary.htm

 

[Uberplayer]

24-bit information comes from Darg's Icon Creation Tutorial.

Icon Basics

All icons in Warcraft 3 are 64 x 64 pixel 24-bit pictures in TGA or BLP format.