A way to group or map 3x LEDs as one for 2D Matrix?

Hey there, wonderful WLED community :slight_smile:

I’ve made a large 6x6 2D matrix with each “pixel” containing 3x LEDs, wired in serpentine (diagram attached).

I’m looking for a way to address each group of 3x LEDs as one. I’ve tried the grouping feature, but that groups in both X and Y, leaving me with a 6x2 virtual matrix, which isn’t ideal.

I’ve explored ways to make a custom map with the mapping feature but no luck.

Are there any ways to make this work in custom mapping, or hard code this in the firmware before compiling?

Anything to stop me from hard-wiring each group together… :smiling_face_with_tear:

Many thanks in advance!