> ## Documentation Index
> Fetch the complete documentation index at: https://docs-unity.molca.id/llms.txt
> Use this file to discover all available pages before exploring further.

# VR SDK overview

> What the Molca VR training SDK includes and which docs to read first.

The **Molca VR training SDK** lives under `Assets/_MolcaSDK/_VR/` (often in **molca-sdk-vr**). It adds **scenarios** (simulation and tour), **session** integration, **XR training steps**, **scoring**, and presentation helpers on top of [Molca Core](/core/runtime-manager) and usually the [Shared module](/shared/game-manager).

## Start here

| Topic                                            | Page                                                   |
| ------------------------------------------------ | ------------------------------------------------------ |
| Layers, glossary, app flow, scenario states      | [VR architecture](/vr/architecture)                    |
| Modules → scenario → activities/steps vs tour    | [VR content hierarchy](/vr/sdk-content-hierarchy)      |
| Scenario **assets** vs **Unity scenes**          | [VR assets and scenes](/vr/sdk-assets-and-scenes)      |
| Project boot (settings, RuntimeManager, modules) | [Runtime and settings](/overview/runtime-and-settings) |
| Which repos and folders apply                    | [Platforms](/overview/platforms)                       |

## Setup and first scenario

* [Scenario Data Config](/setup/scenario-data-config) — catalog and modes
* [VR session flow how-to](/setup/vr-session-flow-how-to) — Preload → Auth → Home → scenario
* [New scenario quick start](/setup/new-scenario-quickstart) — asset to playable scene
* [ScenarioManager](/vr/scenario-manager) — in-scene orchestration

## Cross-product context

Molca Core (sequences, HTTP, modals, settings) is **shared** with other products. The **Digital Twin SDK** does not use this VR scenario stack — see [DT overview](/dt/overview).