Grimjaw - Halloween Tea Light Lantern + no AMS!

Oct.23 2025 - Update: In response to a few comments about losing supports for the upper teeth - I haven't been able to replicate the problem myself, but still I've attempted to make them more robust while trying to keep them relatively easy to remove. Please let me know if you still encounter issues. In addition, a new profile was added that supplies alternative body parts for the No AMS version, one for a single tea light and one for no tea lights, in response to requests. Other changes: Geometry simplified for “Pumpkin Guts” insert, should increase slicing speed. Seams moved to back. 

Oct.10 2025 - Update: I've had a lot of suggestions on making Grimjaw printable without an AMS, and there is now a No AMS profile available! This replaces the somewhat redundant single color profile, and prints in a little over 5 hours (with the default “pumpkin guts” insert, more if printing additional included inserts). Also, a tolerances test profile has been added, to assist with scaling the model to use the LED tea lights that you probably already own. More information below!

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Every Halloween, as the sky turns dark and children prepare for mischief, a house is chosen. Whether by careful design or out of haphazard chaos, none can say; but on that stoop, the air begins to smell of smoke and a low sound, like rocks grinding together, can be heard. Out of the shadows, Grimjaw emerges. Cold. Grey. Stone. Its color begins to change, tendrils emerge, forming into a stem. 
 

Its eyes glow with an unholy light. Dimly at first, as its face begins to carve itself into a grin. Try as it might, Grimjaw can never fully take the form of the Jack-o-Lanterns it tries to emulate. Too tall, too square. But few ever notice. 
 

Giggling and laughing, the children come. They ring the doorbell, they wander off with their treats. Grimjaw watches. Nobody watches Grimjaw. 
 

The night passes, the gaping maw growing ever wider, and Grimjaw sees its chance. The doorbell rings one last time - a dull, hollow sound - and the house’s confused occupant opens the door to find nothing but some spilled candy lying on the stoop as dim, glowing eyes fade back into the shadows. 

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Building on some feedback I received from people regarding my entry into the Power Meets Creativity contest, I decided to rework the model I made EcoJack from into a standalone piece of lighted holiday decor. If you liked his spooky tiki-inspired styling but were disappointed that he had such a limited use case, then allow me to present Grimjaw - powered by a pair of basic electronic tea lights, available from Bambu or a variety of other places on the net. 

Grimjaw can be printed in 3 colors as designed using an AMS, or an AMS-free version is also available, which prints as three separate parts, which can save you time and material at the cost of convenience. The AMS model is painted within and without to make sure his eyes and mouth don't lose light transmission if you decide to print his body in a dark color, like black or purple. You could paint the teeth to be a different color, I tested with bone white, but it seems to work best when lit if the teeth are the same color as the body. Print the Duo profile if you want a matching set for your bookshelves.

In additional testing, I found that supports were not necessary for the light sockets, and so these supports have been removed from the latest version of the print profiles. In general, I have avoided using supports on any place where a bit of hanging would not be visible or cause problems, which should help a little with print times. You will probably notice some hanging or stringing in or around the light sockets and the top of the model. This is expected and should not affect usability or appearance and they can be ignored or removed with tweezers or snips. For the No AMS version only, the hole at the top of the model (No AMS version only) will likely have some strings around it on the inside that you may want to clean up.

For the No AMS version, I have included a standard “pumpkin guts” insert that fits the original design, but have also included a plate with a smooth, blank insert (pre-fitted with a “grasping hands” design from an SVG file as an example). You can remove this and customize it with whatever design you like. I recommend using 100% infill for the area with the design to ensure consistent light transmission). 

For those who already have plenty of LED tea lights and don't want to purchase more, I've added print profile for a tolerance test of a light socket. You can open this profile in Bambu Studio and use the scaling and measuring functions (screenshot below) to determine what scale you need to print the model or it's parts at to fit your tea lights. Notches are modeled in to assist with finding the right measuring points. I recommend adding .1mm for tolerances, depending on your printer and material. If you report back with the tea lights you used and the scaling percentage, I will add them to the table below. 
 

I found in my testing that orienting the file to be flat instead of vertical was sufficient to determine whether a tea light would fit properly, while being significantly faster to print. If you want to make extra double sure, print the model oriented with the hole positioned vertically.

Thanks for checking out my model!