There's a second thread about this - not uploading the controller certainly seems to be part of the issue... if that doesn't get fixed none of the other experiments are valid, really.
Let's review the settings.
It certainly looks like the lights are connected up/down, so vertical is correct.
Because you have 3 controller ports, 3 strings is correct.
20x40 = 800, so that number of nodes/string is correct.
Where I think it might be wrong is the number of strands/string. There...
Well, try setting to 4 channel just to confirm... but yeah it is probably a different item than you are used to. I am guessing someone will want them though, even if you don't.
Wow, things have changed since I was a kid in PA... we had bang caps, sparklers, and those snake things, that was about all you were allowed. No roman candles or anything ... Anyone who had anything interesting had smuggled it from West Virginia.
Well... your location for a matrix makes sense also. I just thought I'd lob a matrix on somewhere without putting too much thought into it, space there was empty.
The location I selected is ambiguous ... it could be 20' away or 100' away, could be made of bullet/square pixels, seed pixels, or...
By width and depth you are fine by eyeball... by the numbers, the enclosure is 290mm and the PSU is 215mm, so by length there should be room in the bottom for the cables to enter and bend around to where they belong, so I would totally be fine w/ the enclosure you have, if you think the thermals...
Different enclosure obvs (this is the closest thing I had for reference)... if you 3D print the Mean Well mount and put the LRS-350 PSU in the bottom and the board on top, it sure looks like it ought to fit (the board is wider than the PSU so it should be fine). That said, if you wanted a...
Try this (imagine it overlaid on the house as so):
1: Minimal, using what you already have... 16-port controller, you said chromatrees (now I see it was slender trees, not singing, oops) and I see 10 canes plus you have 3D print snowflakes (imagine them where I put the diamond flakes)... this...
Wow, been a couple years since I saw a new regulated pixel. You see a regulator inside it?
I would throw WS2808 into the mix then, they're 12V native and use a lot less power than regulated. Been using a couple thousand of them for the last season mainly for the low power, not the 4-wire. No...
Sounds like an amazing box!
The solution I recommend for the "box full" problem is to get an additional box ;-).
Seriously, that enclosure is the right size for a 16-port build, don't be afraid to have more than one controller, keep the player outside the controller enclosure (since there only...