Irregular shape ledmap - What's supposed to happen?

I’m doing my first project with wled, switching out the lights in an old Christmas decoration (a star) to RGB lights. I’m planning on putting pixels into the spaces where the old lights where. It’s 70 pixels, arranged in to 5 arms of a star. I’ve added the 70 pixels under settings, I’ve created a 2d matrix (45x45) and I setup a ledmap.JSON file, and checked that segments list a 45 square grid.

The problem starts with Peek, it only shows a grid of ~22x22, and the few pixel locations that show up there don’t seem to be in the right place.

What am I doing wrong? Am I hitting a limitation?

hi @wiwijumbo welcome
ledmapping in matrix is not suported

Try to reduce your virtual matrix as 45x45 is too large .
While i did not yet build a fixture on a single esp with more then 1k leds with wled
that uses ledmaps( for a good reason ) , i know there seem to be an issue in json buffer
as we seen in few cases , change that in const.h ( JSON_BUFFER_SIZE to 50000) and test .

Are you sure about that ?Because there is a whole channel in discord for 2d

That was the problem. I’ve squeezed the shape down to 31x31, I’ll just have to do some fine turning I think.