castle-nim from the wonderful land of manhwaland
That's a popular asset, hope the original designer got compensated.
The worlds are I presume modeled after baroque or later Europe and may or may not have magic. Very original, much Otome Isekai. Bonus points if MC is a villainess.
Feasibility: 5-9 depending on the actual setting it's featured in. Could historical 17th-18th century people build that, yes. Would it be a good investment to build it... no. It's way too big. However, this might be more of an issue of the people using the design. I have a feeling, it's intended to be a lot smaller, large still, but within realistic scope. If the setting it's in has magic and it's commonly used in construction, then I see no issue in building a palace that big.
Score: 6, learn to downsize, your micropeen doesn't need to be highlighted that much.
Design & layout: I can't decide do I like it or hate it, I flipflop between the two. At a glance it's a nice castle style palace. Huge and just radiating grandeur, very in line to a powerful kingdom, aiming to both impress and intimidate. You could easily toss this into a Souls game and most wouldn't bat an eye. I like the towers, the side ones and the central one, must have an excellent view from there. The gate-arch is grand, if not overly so, to the point it's so large, it must have been a pain to construct and to maintain. Hope they have elevators, cause whoever resides/works in the top floors must otherwise have quite the legs. The connecting arch between the main tower and the gate arch is a nice addition. I really like connecting bridges as a design, and more buildings should have them. The turrets everywhere are distracting, however, it's actually quite accurate to the 17th-19th century castle-palaces/manors. They really loved to stick them where ever they could, so can't fault these guys for it.
So... where are the windows? The gate arch, main tower, bridge and side towers all lack windows. You build something
that big and you don't add in windows for people to take in the view? What's the point in that? For that matter, add in some balconies too, so you can really look down on your subjects while sipping your bewerage of choice.
What's up with the side towers. Two of them are hexagonical and more of a spire design, but then the last one is square and resembles an actual defensive castle tower? Keep your style consistent!
Score: 7½, I guess I like it. It's clearly a "lego" build made from various 3d pieces that were combined by some asset designer into Castle-nim. For what it is, it's quite good and explains why it's used so much by various background artists. It's still all over the place, but as someone, who makes trpg stuff similarly, I can't judge it that hardly. However, if this is original 3d art, then I'd drop the score to 7-.
Defensibility: It's a big complex surrounded by a wall that forces you to assault it from limited directions, mainly the front courtyard and then the gate-arch. But in those terms an office building is a well-defended structure. Sure you can force the enemy to many bottlenecks and tight-space fights, allowing the defender to negate the numbers advantage, but this presumes that the assaulting enemy isn't made up of elites that excel in this kind of combat. Bottlenecks serve quality and that isn't always on the side of the defender. The palace itself offers very little visible advantages to the defender: no walkable walls, no balconies, arrow slits, the towers and turrets are decorative and the scarcity of windows doesn't help either. Then again, this clearly is a palace/manor made to resemble a castle and not an actual defensive structure. However, you can still design your castle-manor to be defensible, without losing on style points.
In terms of a siege, useless. It doesn't look that sturdy and would fare badly under bombardment. Since it's a palace, if it's besieged, then the city around it has already been taken, including all the actual defenses and it's game over.
Score: 5, it does give some advantage to the defender and it would be a good last stand location, but it isn't and wasn't designed to be defensible. Planting your flag on top of that arch would result in a good photo op, just remember to remove any signs of looting from the soldiers featured.
Overall score: 6½.
For a lego background asset it's passable. There are things I like about it, like the connecting bridge, but those then highlight the issues I have with it. Really, add some windows for views sake! How to say it, the design started out good, but then the creator gave up when adding the details and submitted, what essentially is a beta version. And it really is too big, even for fantasy. This is a very common issue in manwhaland, for that matter, their sense of scale sucks. Don't rely on store assets that much either!
If this was a video game location, I bet there'd be greatbow archers sniping you, when you are forced to walk on the top of the bridge.
Amusingly, I've never met Castle-nim and I do read a lot of korean stuff.