Colours
By kalasnikov471
Alpha Channel Colours
By default the alpha channel that we have created will be filled in black which means that the background image will be 100% transparent. But we want the image to be 50% transparent, so let's add some white to channel which will change the colour to gray. (Remember I said there are only 2 colours in the alpha channel).
In the top right corner of the window you should see something like this:
We will use this to select the level of transparency which will give us the appropriate colour with which we will replace the black colour in the alpha channel.
1. Move the slider to the middle until the little box beside it displays "50%" or simply type "50" in to the little box (Image 1). As you can see in the image, the colour has changed to a dark grey which consists of 50% white and 50% black. This is the colour that we will now use to fill in our alpha channel.
2. Next select the "Paint Bucket Tool" from the tool bar and fill the alpha channel up with the gray colour. Select the Paint Bucket Tool by clicking and holding your mouse on the Gradient Tool icon until a little menu opens where you can select the Paint Bucket Tool. (See image). Make sure this (colour) is selected. Once you have selected the Paint Bucket Tool click anywhere on the black square to change its colour to the one we have selected just like in any other painting program.
Finally you should end up with something like this, (see screen shot). Now if you choose to view all the RGB channels with the alpha channel together you will notice that the image is red as the red colour defines areas that will be affected by the alpha channel.
Saving
Now all we have to do is save the image to a format that can be understood by the TexView program. No this does not mean .jpeg, but .tga.
- Click File > Save As
- Give the file a name, I will name it "MyTGA" and save it to your desktop.
- Make sure you have selected to save it as .tga (see picture).
