Rendering issue with latest openscad

[curious aardvark]

glad about that ' cos I've found openscads breaking point :-)

WARNING: Normalized tree is growing past 4000 elements. Aborting normalization. WARNING: Normalized tree has 7123 elements!
WARNING: OpenCSG rendering has been disabled.

that's a 40x30 grid.

Oh yeah if I use 9 facets for everything - It doesn't actually crash :-)
20x15 seems to be the limit.

Well that's a very clever script - can't say any of it make much sense to me though.

Although the text makes sense - was wondering how to use the new text command.

But as far as the rest of it goes - that's just not how I write scad scripts. What's with putting modules last ? That's just illogical

And while I did see a children(); command - not the foggiest what it's doing.

This is the problem I have with the openscad manual - it's written by programmers for programmers. And I was never a programmer :-)
What's with indenting everything - that really makes it difficult to see where a command line actually ends.

So in words of one syllable - what does children do and how do I use it ?

ps. I have stitched 2 15x20 boards together to make a 30x20 in s3d.
first time I've seen the s32d slicer really struggle lol

Now I've got to try and print the bastard lol