Looking good!

I agree on the ground tracks point, particularly for the six and eight-wheelers as they had variations on independent steering per wheel group (and the four-wheelers had independent wheel drives too), so could give much broader overall track spreads.

It might be helpful to have an additional group of aerials to fit to the command vehicles variants (e.g. both the 231 variants, the 232s (6- and 8-rad) and the 222 variant 223), as these are such obvious fixed features in an overhead view, and they have to pass above the turrets, so would need to be drawn that way to allow for the turret pieces to rotate properly.

If you're including the 247, you might want to have the Kfz 13, and the variant Kfz 14 command vehicle - again, it has an overhead aerial, if no turret problem this time!

There are also the SdKfz 221, 260 and 261 (radio car variant of the 260), which you might be able to draw as simply variant top structures/turrets, as being similar to the 222 overall. The 231 (8-rad) headquarters variant, the 263 might be another possibility, along with the 263 (6-rad).

I'll go away now 😎

Honestly, mushrooms are pretty much indifferent to light. They're the fruiting bodies of fungi hidden below the surface anyway, so don't have much use for sunlight either way (except secondarily, because what the fungi are feeding on often does rely on sunlight to exist - trees and such, say), and they often don't last very long given all they're doing is distributing spores into the air.

Of course, magical-land mushrooms might feel differently about that!

Dee-licious! 🍳

Delicious! And spider-meat "bacon". Now where's the frying pan? 😁

That's really nice! And obviously a lot clearer!

The tree-rings discussion has made me wonder if you could simulate the look of tree-rings within the trunk as a drawn polygon using the Edge Striping Sheet Effect. That would need a specific pattern to be available in the catalogue of such items, but it would follow the edge of whatever polygon was drawn, which is clearly a key aspect to the design. Someone better-versed in such things than me could doubtless advise more usefully on the practicalities of that though.