I am going to assume if you know how to edit images you know how
to browse your hard drive folders, and use menus. Also, if you delete
the wrong sprite, or loose the original, use the Pak Explorer program
to retrieve the default sprite.
First you have to decide which sprite do you want to modify. It is
best to use Pak Explorer and extract the sprites to a folder of your
choice. This will allow you to browse all the sprites and guide you
on your decision of which sprite you want to create. The Pak file
for Half Life is located in the "C:\SIERRA\Half-Life\valve"
folder. You will have to view the sprites with the Sprite-Viewer program.
Once you have decided which sprite to modify, use the Sprite Viewer
program to extract the BMP file and the QC script file. To do that
click the file menu, and select save sequences, the sprite file must
have the same name.
Use the BMP file as a guideline for the image size, the sprite will
have to be that size for it to view properly. Edit the image with
the art program of your choice, and make sure you save the file as
a " 256 color BMP" file under the same name as the
extracted BMP file.
NOTE: For animated sprites to compile corectly, all bmp files must
have the same color pallette.
Now to convert the BMP file to a sprite file you will use the program
Sprite Wiz. The program is very simple, it will lead you through the
steps in creating the sprite, just read the prompts.
There are 4 different types of sprites that can be created.
Additive - 256 color with
additive transparency (Most Common)
Alphatest - 256 color,
last color in palette is the transparent color.
Indexalpha - Greyscale,
last color is the sprite color
Normal - 256 color, no
transparency.
NOTE: The qc file extracted will tell you which mode you should pick
when making the sprite. Also, if you choose to use alphatest, you
may have to edit the palette for it to properly work, if you have
created your own palette.
I recommend to save your deferent sprites you edit in different folders
so you don't mix all of your work together.
Once you have created the sprite it is time to save it to your valve/sprites
folder.
C:\SIERRA\Half-Life\valve\sprites\