Ready-Made Graphics
To install different “looks,” download and unzip this collection of eyeball graphics:
Inside the “eyes” folder are several sub-folders, one for each of our ready-made eye designs. “hazel” is the standard human eye from prior projects.
Each folder contains a set of .BMP images for that eye, plus a file called config.eye. Copy one of these folders to the CIRCUITPY drive — not the individual files, but the whole folder. Then copy or move the file called config.eye out of the folder and into the drive’s root directory.
Remember that config.eye goes in the root directory, along with the hazel (or other eye name) folder:
Now you're ready to load the Monster Eyes firmware! The firmware will access the config.eye file, which is a JSON-formatted file, and navigate to the main graphics folder based on the information in config.eye.
big_blue is a pair of large and friendly blue-gray eyes. The sclera doesn’t have all the veins of the hazel eyes, making this less creepy.
fish_eyes is the same unblinking eyes used in our Fish Head MONSTER M4SK project.
reflection looks like a pair of shiny spheres. No eyelids or pupils, just spheres looking extremely reflective. *ting!*
snake_green is perfect for dragons and other reptilian characters. Rar! This shows off the slit pupil option…also useful for cats and the like.
spikes is adapted from the guide CustomEyesation: DIY Monster M4SK Graphics and demonstrates a bit how the distortion of texture mapping works.
doom-red and doom-spiral were designed for the MONSTER M4SK Toon Hat guide but might have other uses or tricks to learn from.
Page last edited September 04, 2026
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