Minecraft wiki entry for Custom_texture_packs, associated text: Although Microsoft Paint does not handle transparency, it can still be used to make/edit textures. If you open a PNG image in Windows XP, a window should pop up showing transparency as a white and gray checkered pattern [does not work Win7 - no options of this type available]. There is a tool located on the toolbar that should have a screen tip with 'Change to transparent' or something similar. Go into Microsoft Paint and create/edit your texture(s). Find a color not used in the texture, and fill in the white space with it. Then, select the area desired to copy and paste it onto the PNG image. Paste it onto your PNG image and make sure to cover it completely. Simply change your unwanted color to transparent using the tool mentioned earlier, and every last pixel of that color on the current document will be changed to transparent. Beware, make sure that you do not click the wrong color, as this may mess up all textures in the document.