Hi Sebastian,

To create the simplest level switch, you should use the Open Level blueprint node instead of level streaming.
The Open Level node does not support seamless transitions, meaning the picture will be frozen while the computer loads the level.
This node completely replaces the current level with a new one, so all blueprint logic must be present in each level to facilitate switching. Therefore, it is recommended to create an Actor Blueprint class instead of using the Level Blueprint. This Actor Blueprint can be easily dragged and dropped into each level.

To do this, open Unreal's Content Browser, right-click, and select the Blueprint Class option:

Choose Actor Parent Class:

Name the created file, for example, "LevelSwitch", and double-click it to open:

Click on Open Full Blueprint Editor text if the following message appears in the new window:

Right-click in the Event Graph and Add and connect the following nodes: Get Aximmetry Trigger, Get Aximmetry Text, Event BeginPlay, CustomEvent, Bind Event to Trigger, String to Name, and Open Level (by name).
Note, the Context Sensitive search must be turned off to find the Bind Event to Trigger node: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/obtaining-graphics-and-virtual-assets/creating-content/creating-content-for-aximmetry-de/additional-control-with-blueprints/#context-sensitive
When connecting the Get Aximmetry Text to the String to Name node, Unreal will automatically create a node to convert the data from text to string.

You can also copy these blueprint nodes from here: https://blueprintue.com/blueprint/c9_yehtc/

The blueprint must be added to all levels. To do this, open each level one by one and drag the blueprint from the Content Drawer into the Viewport:

 Make sure that the same Aximmetry camera has been added to each level:

In Aximmetry, you will see two new pins. The trigger pin (named "Switch Level" in the example blueprint) starts loading the level, and the text pin ("Switch Level Name") specifies which level to load:

You can specify the level's name without any path, but this will increase load time as Unreal has to search through all the files in the project.
To avoid this, right-click on the desired level's file, and select Reference Viewer...:

From there you can copy the reference of the level as shown here:

If not all levels have the same Get... Aximmetry nodes in blueprints, then you must ensure that in the Project Settings, the Editor Startup Map and Game Default Map contain all the Get... Aximmetry nodes that will be used in other levels, including matching their name parameters.

This is because this first level is being used by Aximmetry to populate the pins on the unreal module in the Flow Editor.

Warmest regards,

Hi,

We've noticed that there have been questions and confusion regarding the various level-switching methods available in Unreal, and how these can be effectively utilized with Aximmetry. To address this, we have created a comprehensive document detailing the process of level (or scene map) switching within Unreal Engine.
You can read the document here: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/obtaining-graphics-and-virtual-assets/creating-content-for-aximmetry-de/advanced-information-and-features/switching-scenes-with-levels  

Warmest regards,