Graph spawning for dream journals
Your last position on the graph determines where you'll spawn in the next dream. This is done in LSD Revamped with a texture map.
Basically in the root levels directory (/levels/), where your dream journal's TMAP files are stored, you will have a 19x19 PNG file with the same name as your dream journal. Each pixel in this image corresponds to a graph square, and consequently a level to start a dream on. The level is encoded in the alpha channel of the image, so for example an A value of 0 will load the first level in your journal's directory, an A value of 7 will load the 8th, etc.
Here is a template to get started. Every section of the graph is a distinct color, so you can just flood fill with the correct alpha values.
If you want random spawning, just don't make a PNG file and the game will default to random spawning.
On the first day the game will by default spawn in the first level in the directory, at the forced spawn point.