Ernie;
I am with you! I am always a bit bewildered that so many otherwise GREAT-looking Pz IV builds depict tracks seemingly without hardly any tension at all!
It's like that aweful "fashion" ... "the sag-look"!
Most Pz IV pics, as like this one (maybe a newly-painted, new, factory, or rear-area depot vehicle?), do show tracks pretty snug.
@Tat; It's a neat scheme! And, you have the photo-evidence for it! So go paint it and feel right! I think I've seen somewhere pics of a build with this (or like it).
I have seen maybe a couple of other pics portraying a similar scheme- it does look like a modified, simplified "ambush", to me? I expect that the colour pattern is about the same- tri-colour with "opposite" spots.
Maybe this vehicle could be waffen-SS - they did somewhat different and more-elaborate camo-jobs than did most Heer crews. There are no unit markings that I can see.
Some other things: That air-filter... I think typically installed on Pz IV types used in on Russian Front ca 1943. Maybe also on vehs in the Italian campaign?
One can clearly see that those curved shields beneath the muffler appear to be wholly-painted and even distinctly-different in colour from the muffler itself. So, at least on this specimen, these have not heated-up and rusted- yet!
And note how THIN that tow-cable is! Much thinner and with smaller eyes than it seems many folks like to depict. IF this is the stock cable, this would argue for us to slim our cables down a bit!
I find intriguing the apparent lack of Zimmerit! That's both curious and encouraging, as 1) I was under the impression that about all H had it "factory-applied"

and 2) I would LOVE to be able to build an "honest" H without it!

Of course, some might argue that the apparent fuzzy resolution and clarity is simply obscuring what is "obviously" there... But my hopes spring eternal!