Using the WordCloud library in Python, I created a word cloud in the shape of a heart from the text of William Shakespeare's Romeo and Juliet as available from Project Gutenberg. For the text, I used the font Smooch from Google's OpenFonts.
After exporting the word cloud as a black and white image, I converted it into a lithophane using ItsLitho.com (initially, I had used Cura, but ItsLitho added a frame and a bit more stable lithophane). I have a flameless candle I can use behind it already, and it has a 3" base, so I used Tinkercad to design a basic stand for this lithophane that would also work with the lithophane I made from The Odyssey, and will work with that particular candle.
NOTE: Until it could be further tested, I would recommend only using flameless candles with these models.
Initial test print picture in front of a candle now included- it was too big of a layer height and my nozzle was a bit high, but the lithophane printed and looks pretty cool in front of the candle!
Update: After learning a ton about lithophanes in the last 24 hours, I added a better quality model for the lithophane itself that I generated from https://itslitho.com instead of Cura. It's aligned with the Y axis and set up vertically. I also modified the flameless candle stand so that wider lithophanes can be accommodated.
The author marked this model as their own original creation.