Hey Fabsterpal,
As I said on the youtube video the assets all adhere to the 5 and 10cm grid. No scaling is required to create environments using the assets provided. I’m assuming you may be referring to the wall in the hallway intersection of this picture?
If so, then yes the wall meshes in that room have slightly modified dimensions. And here’s why:
The hallway intersection was designed to have 4 doorways, connecting 4 hallways. You can see this demonstrated in the hallway directly across the one depicted in the photo which has a doorway/door on that opposite wall. Here’s a photo that might better explain it.
There was never any intention for there to be a wall on one of the 4 sides of that intersection. The only reason I modified the assets to provide one was to show what’s possible if you wanted to tweak some of the dimensions to get more out of the assets.
This practice is also demonstrated in the collection environment. The windows of the Interior package are designed to fit the dimensions of the “main” hallway length. There are smaller hallways introduced in the pack which connect the rooms together and also use different dimensions. This was done for many reasons, but mostly to avoid homogenizing the assets too much in terms of size. The packages all have a blueprint of scale which I continue to build upon in subsequent packs, or updates. i.e. New wall meshes that can swap into place of another seamlessly. Same goes for floor meshes, or ceiling meshes. It can be seen with the recent expansion update to the Interiors pack which added new wall dividers, floors, floor dividers, ceilings and walls that can be swapped with other similar assets that take up the same space.
Because of this, assets designated for the main hallways cannot be substituted for assets used in the smaller hallways. This is inevitable in almost any modular pack, because unless you have a fully homogenized, 1:1 scaled square asset for every piece (which in and of itself limits your design) then you will always have pieces that are designed for certain purposes.
Here is an example of me repeating what I did with the intersection hall in the Hallways pack in the Collection environment. The dimensions of the windows were adjusted to allow them to fit the scale of the smaller hallways and be rotated along the sides. This was actually inspired by a customer who shared their work using the pack to create a similar design, although theirs spanned a 180 degree arc.
So basically the wall of that intersection is to help give ideas for how you can modify the assets to go beyond their intended purpose. The intersection (as seen in the rest of the example environment) was always intended to have 4 doorways (either closed, or opened) connected. For the hallways pack, the closed doorway was always the cap, so to speak, for the environments.
Hopefully this answers your question. Let me know if you have anything further to ask. =)