The dioramas guide do assume some familiarity with CC3+. For example, for step as you refer to, it skips telling you about hitting "Do It" after you are done making the selection since this is common behavior whenever you use a CC3+ command that requires a selection.

There isn't that much documentation on Dioramas 3 itself, mostly because almost every is done using regular CC3+ commands, Dioramas is mostly a set of specialized templates, textures, and symbols. There are a few special commands, like the tabs and stuff which is handled for the most part in the quick access guide.

I tried replicating your problem with not being able to put tabs on all sides, but I am unable to replicate that. Not sure what could be happening there.

Seems like an oversight if the quick start guide doesn't mention fold lines and cut lines, but there are buttons for both of these in the left hand toolbar set. They are just basic lines, without any special functionality.

As far as I can see, all the textures from the examples on the Dioramas product pages should be in the product, but which textures the program presents you with depends on which style you picked when starting your drawing (Bitmap A, Bitmap B, Vector, Pro) [You should use one of the first two], but keep in mind that the finished examples isn't just a texture on a surface, additional details have often been added by placing symbols, drawing things like beams, and adding shapes on top of them, the textures provided are the starting background.

The Tome of Ultimate Mapping goes further into Perspectives 3, but just as with the quick start guide, it does assume familiarity with CC3+, you'll quickly reach a block if you just try to read the Dioramas section. And of course, the Tome is a paid product, intended for users who wants a deeper dive into the software.

To save everyone's time, I'll just point out that I cannot accept maps that rely on custom artwork in the atlas. Details here.

Looks like your current map is in the basic CC3 dungeon style. That style doesn't have additional catalogs, as it is just a vary simple preview style for dungeons. All symbols are in the symbol catalog being loaded with the map, the one currently in your symbol catalog window.

There isn't a setting for a default save location, but it should be remembering the last folder used.

For a workaround, you can also use Windows' only features, such as pinning a folder to quick access or making a library, since these are easily accessible from the save as dialog.

Yea, this particular article was written with the intent to hide things that are "outside" the structure.

When it comes to your house, that's a very tricky thing if you let the players have access to the entire map, as that clearly allows them a different view than a person there would have, and instantly reveals things like too-thick walls or suspicious corner. I would be tempted to give the players a modified version of the floor-plan, where the rooms are slightly larger, maybe the house slightly narrower to hide such thick walls. Only if they actually start measuring things should they be given the true map so they can see that there is something wrong here....

Of course, some players may call foul on such an approach, feeling mislead. And it also means preparing two maps instead of simply hiding something.

For reasons like this, I usually never let the players see the entire dungeon. I practice hiding everything they can't currently see. (Using MapTool hooked up to a projector)