USDZ + Unreal Engine — Import 3D Scenes for AR + Cinematic Renders

USDZ (the iOS AR format) and Unreal Engine often appear in the same search query but they're solving different problems. Two paths covered below — short version: most teams want the GLB-to-Unreal route, USDZ is for the AR Quick Look pipeline.

# TL;DR

• AR Quick Look (iOS Safari, tap-to-AR on a webpage): export USDZ from Yugma. Open on iPhone. Done.
• Unreal cinematic / game: export GLB from Yugma → import into Unreal via glTFRuntime (runtime) or Datasmith (editor-time).
• Native USD in Unreal: Unreal supports .usd / .usda / .usdc via the USD Importer plugin; USDZ requires unzip first.

# Path 1 — USDZ for AR Quick Look

This is the simpler case. You want a tap-to-AR experience for iPhone users on a marketing page.

Steps

1. Compose your scene in Yugma.
2. Export → USDZ. Yugma's Pro tier exports USDZ directly.
3. Host the .usdz file (your CDN, your Shopify, your hosting).
4. On the page, link with .
5. Open on iPhone Safari → tap the link → AR Quick Look opens.

# Path 2 — Unreal Engine import (cinematic + game)

For Unreal projects (whether film pre-vis, real-time visualization, or game), you'd typically use GLB or USD. Yugma exports both.

Option A — glTFRuntime for runtime loads

Install glTFRuntime plugin (free on Unreal Marketplace). Supports loading GLB at runtime — useful for user-uploaded scenes or dynamic content.

// Sample C++ usage
UglTFRuntimeAsset* Asset = UglTFRuntimeFunctionLibrary::glTFLoadAssetFromFilename(
    TEXT("/Game/Yugma/scene.glb"), false, ConfigStruct);

Option B — Datasmith for editor-time

Datasmith is Unreal's pro pipeline for importing 3D content. For Yugma scenes:

1. Export GLB.
2. In Unreal: Datasmith → Import → choose the GLB.
3. Datasmith preserves materials, lighting, and hierarchy.

Option C — Direct GLB import (Unreal 5.x)

Unreal 5.x has native GLB import. File → Import → select .glb. Lighting needs a recompute (Build Lighting → Production).

Option D — USD Importer plugin

Enable USD Importer in Unreal's Plugins. Supports .usd, .usda, .usdc files. For USDZ, unzip first (USDZ is a zipped USD).

# Common Unreal gotchas

Pink materials

Same cause as Unity: shader can't be found. Fix: select material → Material → assign default Surface (Lit, opaque).

Materials look "plastic"

GLB roughness sometimes imports as 0 (mirror). Fix: select material → adjust Roughness to 0.5-0.7 for non-metal, or 0.15-0.3 for metal.

Missing lights

GLB sometimes carries lights that don't map cleanly to Unreal's light system. Easiest: place Unreal lights yourself rather than rely on imported ones.

Animation doesn't play

If your GLB has skeletal animation:

1. Import via Datasmith or Skeletal Mesh import.
2. Verify the Skeleton Asset was created.
3. Use Animation Blueprint to play the imported clip.

Lightmap coordinate issue

If you bake lighting in Unreal, your GLB needs proper UV channel 1 (lightmap UVs). Yugma's GLB export uses one UV channel; for Unreal lightmaps, generate channel 1 in Unreal: select mesh → Static Mesh Editor → "Generate Lightmap UVs" with source UV set to 0.

# A real workflow: Yugma → Unreal cinematic pre-vis

1. Compose pre-vis scene in Yugma (90 seconds).
2. Export GLB.
3. Datasmith into Unreal (5 minutes).
4. Place Cine Cameras for shots.
5. Add post-process volume for cinematic look.
6. Sequencer for camera animation.
7. Render.

Yugma is upstream of Unreal, not a replacement. The blockout phase becomes 90 seconds instead of 2 days.

# When to use which format

Read the AI 3D export pipeline pillar → Read the AR/VR export checklist →