Brighten Portion of Image?

[tspence]

(08-12-2017, 04:41 PM)Ofnuts Wrote:

(08-12-2017, 02:27 PM)tspence Wrote: Not quite sure I understand the concept of adding an alpha channel but will give it a whirl.

With out alpha channel, an image has just three channels : R, G, B. The values of these channels for a given pixel tell how red/green/blue it is. With an alpha channel (noted 'A'), the image has four channels (R,G,B,A). The value of the 'A' channel for a pixel tells how opaque it is.

Gotcha - thanks!