Tilemap Collider 2D Issue

Enable PlatformEffector2D.useOneWayGrouping. This ensures that contacts from a collider all stay in sync (are grouped) when using one-way i.e. when a contact is disabled, all subsequent contacts are automatically disabled too. This is very important if the collider is made up of many shapes as each can produce a contact the physics system will try to solve.

 

If you're using outline mode then they are simply lines, there is not inside of the collider so all edges are treated as separate surfaces. If you're shrinking your player so that it can fit "inside" an outline box without being in contact with any of the edges then the platform effector isn't going to be of use to you. For one-way grouping to work, you need at least one contact at all times for the other contacts to follow so if you get inside the box on the way down but have no contacts then hit the "bottom" of the box then it is treated as a surface. It has no way to differentiate it.

To get around this, your player box needs to extend vertically so that it is always in contact with a top/bottom edge of a platform collider.

 

There are also lots of Unity games with "Perfect" jumping too.

What do you mean by "better" specifically? The platform effector knows nothing about the tilemap collider or any other collider, it's job is simply to look at contacts and it does that well. I believe you're having other issues here.

Again, what specific "more options"? For edges, that's what the composite collider is doing already but this is the source of your problems AFAIK. Using edges as an outline does not produce a closed (solid) shape so you can contact interior edges. From what little I've gathered from the single screenshot and description I am guessing this is indeed what's happening here. The grouping option gets around this but also won't help if your character can sit inside the tile without touching it.

If you think that's necessary but to be honest I'm still not sure exactly what problem you're having here. Remember, I'm only going on a single screenshot and a simple description. Maybe if you post more info on what you're seeing I can help you further.

In summary, I am "guessing" that your character is smaller than a tile which in itself is unusual and this is the source of your problems. Can you post a screenshot at the moment the problem occurs and please turn on the collider gizmos so I can see where the collider outlines are. One way of making this easier is to go into 2D physics settings and enabled "AlwaysShowColliders" and even "ShowColliderContacts". You can also pause and see the contacts in the inspector by going to the respective collider/rigidbody and unfolding the "Info/Contacts" option there.

In the end, the solution is to ensure that you are always in contact with the inside of a tile.

 

You don't have to have a square collider, you can have any collider shape you like including a custom one.

 

The collider shapes are set-up in the tilemap tiles themselves. Each tile has a collider type i..e. sprite or grid with grid producing a collider shape the same as the grid shape whereas the sprite uses the physics shape from the sprite that the tile uses (edited in the sprite editor).

The tilemapcollider2D is just a collider component, each tile isn't a separate component; that would be prohibitively expensive. Each tile produces collider shapes that are contained within the tilemapcollider2d.

 

Have you watched any Tilemap tutorials (lots around) that tilemap discuss collision? I would recommend it rather than me trying to describe it here. Also, there’s an overview in the manual.