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Sublevels.md

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To Load a Sublevel:

  • Open your main/Persistent level.

  • Then open the Level Editor.

  • Click Add Existing Level and choose the sublevel you want.

To add objects/lights to your sublevel:

If you want to add items to sublevel, not the main/persistent level:

  • In the Level Editor: Select your sublevel, Right-click > Make Current. You will see the name of the level change at the bottom-right of your viewport. Now you can add your objects/lights.

Important note!
  • You see all the items from your un-hidden levels in your World Outliner window, so be careful not to change something in another level accidentally.
  • If you want to be sure while making changes, you can hide all other levels, make your changes, then unhide them again. Or you can open the sublevel normally as a level and make your changes.

For Lighting Scenarios:

If you want to add different lighting scenarios, you need to add them as sublevels and then specify to Unreal that this is a lighting scenario so it should build and use the lights from it. To do this:

  • Prepare your meshes in one level without lighting. This will be your main/persistent level.

  • Then place your lights in a seperate level. You can create a new level or Add an existing one, as shown above.

  • Right-click your sublevel > Lighting Scenario > Change to Lighting Scenario. Or toggle the light icon next to it.

To Build the lighting:

  • Unhide all of your levels, and toggle "ON" all of the light icons of only the sublevels, then build.

To Set which sublevels should run on Play:

  • Right-click the scenario/sublevel you want to run on Play > Change Streaming Method > Always Loaded. Then change the other sublevels you don't want to Play to Blueprint.

Notes:

-You can only stream one lighting scenario sub-level at a time during gameplay.

-To access the sublevel's blueprint, click the gamepad icon next to it.

For MC:

To add the Motion Controller to a level, you also need to add it as a sublevel:

  • In the level editor> Add Existing > IAIKitchen_MC

  • Right-Click on IAIKitchen_MC > Change Streaming Method > Always Loaded.

Sublevel Lighting Bug

Sometimes after building the lighting, some meshes turn completely black. To fix this, Click the "Sun" icon next to your sublevel to Toggle Off then On again the lighting scenario and your meshes will go back to normal.