Studio Packs change the game-show environment in standard play and Twitch panelist voting. A custom model is optional, but it is the main way to reshape the stage.

Create the Pack in packs_studio from the game's main-menu file access.
Use the template GLB to understand where judges, the contestant, and the three screens sit. The template objects are not required in your final model.
Export as GLB or GLTF and name it model. Test a light scene before adding dense geometry or extra assets.
Use music_studio for WAV, MP3, or OGG music. Use an OGV file named screen for a muted looping score-screen background.
Large model files and high vertex counts can add multiple seconds to loading. Test on the machine that will run the session.
A custom model is optional. Do not add complex geometry just to fill the template; loading time is a player-facing part of Pack quality.
Ready to test
Quick answers
Model scale and load time are more important than visual complexity in a first test.
Next step
Confirm model loading first, then add music, screen video, lighting, and related cast Packs one at a time.