[HELP] Blender modeling

[Statyk]

Alpha channels are a channel in an image that allow for transparency. There is Red, Blue, Green, and Alpha. To add an alpha channel in Photoshop go to Window>Channels. Add a new channel at the bottom right of the channel window, and it should generate an Alpha channel.

The Alpha channel works in greyscale. White to black.

White = 100% visibility
Black = 0% visibilty/invisible
In between/grey = translucent. The darker the grey, the less visible, the brighter, the more visible.

You should paint any part of the image that is a leaf WHITE, and leave the rest black. Common filetypes that support alpha channels are .png, .tga, .dds, though .dds is more for games, Which Amnesia uses. It has a good compression and contains mipmaps, which is a feature in games where, simply put, the further you walk away, the less detailed a texture gets, which is good for optimization. .dds is much more preferred. Compress it as DXT5. Though it takes up more memory space, it holds alpha channels. DXT1 does not, but it takes up less memory space. So be smart when compressing .dds! Only catch is that you need to download the .dds plugin for your photo editing software.

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Edit: Ninja'd like crazy. I guess I took too long typing that.