Strange Tileset Behavior

I'm using a different tileset, built with a combination of the default tileset and the modern themed version.
For some reason, that I can't fathom, all the tiles in the exterior set are walkable, despite me setting them to not be like that. Fences, buildings, water, all of that can't be walked through for no reason. I honestly cannot get what is wrong here.
Include picture for reference, the interior set I made works perfectly fine.

the first thing people would ask you is if you have the top left tile in tab B set to a star? If it is not a star all is messed up. that first tile on tab B is also supposed to be blank.

How old is your editor version? The problem mentioned above only existed with the first few releases, and this was happening so often (and happened so often in Ace) that the developers changed it so you can't adjust that setting on that tile.

The other thing is - have you added something to that map that sets your player to be THROUGH?

@Shaz This is in Ace support. It wasn't fixed in Ace, was it?

Ah, yes, you're right. I wasn't paying attention to where I was :D

Check if the top-left tile in category B is a star; if not, make it a star. Then check if your character still walks through walls. If yes, use a different map and use the same tileset, and check on that map. If it doesn't persist on the new map, then there's most likely a moveroute with a "through ON" check for the character somewhere that wasn't disabled. If it does persist somehow... maybe a script issue doing something to a specific tileset number?

Thank you, that fixed that. What a weird thing.

Not at all - when you understand what the tile is for and what the different passage settings mean.

Every tile, on every layer, has a tile ID. Even if you don't place a tile there. By default (if there is no tile), the tile ID is 0. That happens to be the top left B tile. This is the 'erase' tile and is the only one that should be used if you want to get rid of tiles on the upper layer.

Because you had it set to O, that means every single tile on the map, where you hadn't placed a tile image, has a passage setting of O, which means you can walk through almost everything. The star passage setting tells it to ignore that tile and look at the layer below to get the passage.

what kind of script issue that make this happen , can you give some example, thank you...

Any kind of script that changes the passage setting on tilesets, or makes the player able to walk through normally un-passable tiles.

For example, Yanfly has a Region Restrictions script which lets you override tile passage settings, either for the player, for events, or for everyone.

If you are also having a problem, you should start your own thread with screenshots of your map and tileset, as your issue may be different to the OP's.