Source Filmmaker: How To Edit Splatoon Eye Textures

Chances are, you’ve come here because you want to try creating your own custom Splatoon eye textures!
While the process may seem rather intimidating and difficult, it can also be fun and rewarding to see your own work in action.
In this guide, I will explain what I do to edit Splatoon eye textures. This includes preventing the eye textures from appearing cloudy and saturated on your models.
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What you’ll need:

• VTFEdit[valvedev.info]
• Krita[krita.org]
• The texture you want to edit
• An idea on what you want to do with the texture (can’t make a custom texture without knowing what you want to make :P)

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Got everything on the list? Cool! Let’s get started! :3

Locate what texture you desire to edit, and open it in VTFEdit.
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Once you’ve opened the texture, press Ctrl + E, or select “Export” from the File menu, and name the file to whatever you want (preferably should indicate what changes you made to the texture). Make sure to save the file as a targa.
 

Open the newly exported targa file on Krita. It should look like this.
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The reason it looks like this is because it has a transparency mask on it. Right click the layer, hover your cursor over Split Alpha, and select Alpha into Mask. The layer should then split into two layers, background and Transparency Mask 1.
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After doing this, make the transparency mask layer invisible for the time being, and edit the texture as you please (on any layers other than the transparency mask layer). Make sure to keep the transparency mask layer under the background layer.
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Once you’ve edited to your heart’s content, turn on the visibility for the transparency mask, and save the targa file. DO NOT forget to turn the visibility for the transparency mask back on.
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After saving, you’re ready to go back to VTFEdit one last time. :] 

Now that you’ve saved your targa, open VTFEdit once more, press Ctrl + I, or select Import from the File menu, and VTFEdit will prompt you to choose what you want to import. Select your targa file. Press OK when the VTF Options window shows up, you don’t need to mess with anything on it.
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Your texture should show up. All you have to do now is save the file as a VTF. You should save it in the materials folder in usermod. I highly recommend you add a folder of your own (name it appropriately so you know instantly what’s inside it), and save your texture in there. (i.e. usermod\materials\[your folder name here]\[your texture here])
Once you’ve saved your texture in the usermod materials folder, you’re all set! Just remember where you put the texture so you can type in its location when replacing eye textures on your models.