The Stamp parts (Stamp F and Stamp S) were added in Ver.0.209 and are a premium-only feature. They allow players to use custom textures on boxes and the smoke from emitters (another premium-only part).

Stamp images should be saved in the _images folder (MachineCraft\UserData\_images). The maximum size they can be is 512x512 and they must end with #yx. They must also be in .png format.

#yx works similarly to aspect ratio. It is the division number of the sides of the image you're using as a texture. The y value is how much you need to divide 512 to get to the length of the y axis of your image, this is the same for the x value.

Example:
The sample stamp image is 256x128 in size.
To get to 128 (the y axis), you must divide 512 by 4.
To get to 256 (the x axis), you must divide 512 by 2.
Put these numbers together and the name ending should be #42.



The two values in #yx must only be one digit long and can't use decimals (for example, y can't be 10 or 5.678). I recommend making your images 512x512 in size because at that size, images don't need to use #yx.

Enter build mode and open the Tab menu. Open 'ADVANCED' (top-right corner) and enter the name of your stamp image in 'StampImageName' (example: stamp#42). This is the stamp image that every stamp part in your machine will use, you can only use one stamp image in a machine.

Stamps on Boxes
Place one of the stamp parts adjacent to the box you want to use. Stamp F is for using different frames of your image and Stamp S is for scrolling your image on the box. The value of the action assigned to these parts will change the frame number/scroll speed.

Enter preview mode (Z key) and adjust the placement of your stamp or the tilt of your box to position your stamp.

Stamps on Emitters
Emitters don't need a stamp block placed adjacent to them. In the 'ADVANCED' menu there is an option for changing the stamp frame emitters use. -1 means that the emitters will use the default texture. If your image doesn't use frames then set this option to 0.

If anything in this guide becomes outdated or is incorrect, please point it out in the comments and I will correct it. If you found this guide useful, please like/share it for others to see.