04.10.2020 edit: updated with new placement in CAS and medieval colour theme, improved the weights (= smoother movement) and textures, made hq compatible. Added 2 new swatches as well. Watch out: the filename has changed! Please delete the old file (Apron ACC) if you redownload it, as the new package won't automatically overwrite it (but will conflict in game).
The quality you'll see in your game will differ depending on your sim details' graphics settings, but if your choose 'very high' and install the hq mod, it should look more or less like this:

Works without problems (i.e. explosions and spikes) in lower lods as well.
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Weekend is coming, time for some new CC!
Today's piece has... nothing to do with anything I've been posting here so far. Let's call it another small side project. The idea kept following me ever since I came across this post. Reading stuff like 'this outfit would be great if you put an accessory apron on it' and at the same time 'this outfit should terminate in a skirt, not trousers, but look at that apron!' really makes you want to help solve this problem ;).
So, I separated the apron from outfit no. 4. It was originally made by someone named Myobi, but currently is available only on the Lost S4 CC Tumblr - so I guess it's ok for the creator, if they retired from CC making. At least I hope so. I tweaked it a little bit so that it would work with the outfits mentioned in Small Cowplant's post. Number one was a failure - too many frills at the bottom of that blouse - but it most certainly works with outfits no. 2 and 5., as you can see in the picture above.
You can find it in the left bracelet category.
Comes in the 4 original swatches: green, brown, greyish white and reddish (edit: also blue and grey). They are not as HQ as in the original outfit! I had to fit the same picture in like 10x smaller space, so... You know. The quality suffered from this. (Edit: this has been greatly improved - see the note above).
Base Game Compatible, of course.
Edit: HQ compatible.
All LODs included.
Custom thumbnail.
No shine, bump map or shadow, sorry.
Works for almost all body types. If you set the body fat on max and pull the belly slider as far as you can, this happens:

I tried to get rid of this annoying dot shining through, but to no avail. I hope it's not a big deal, as if you make the belly just a teeny tiny bit smaller, the clipping disappears. The other outfit seemed to be completely fine, but please let me know if you notice any problems!
I know it's totally random, but maybe someone will find it useful. Plus it's nice to do something different and not that practical once in a while ;).
And now I can proceed to get ready for Simblreen!