How to View Allosaurus in 3D
Allosaurus 3D Viewer runs a Late Jurassic Allosaurus - an apex predator of the Morrison Formation - in your browser. Drag to rotate, scroll or pinch to zoom, toggle a 1.8 m person for scale, and click the head, an arm, the tail, or a leg for a fossil-sourced fact.
Open the Allosaurus page and take the camera
Open the Allosaurus 3D Viewer and wait for the facts panel to fill. When the status line says you can drag, orbit the Allosaurus with the pointer and zoom with the scroll wheel or a two-finger pinch. Fullscreen expands the wrapper so the controls stay visible beside the scene.
Use the four Allosaurus controls under the canvas
Under the Allosaurus canvas, four controls handle view and scale:
- Fullscreen - fills the display while keeping the buttons visible
- Stop rotation / Auto-rotate - freezes or resumes auto-spin
- Idle motion - adds subtle breathing and leg sway; tap again for Stand still
- Size vs human - shows a 1.8 m person at the honest length ratio used by the viewer (about 8.5 m average for A. fragilis; largest confirmed near 9.7 m; some sources cite a wider overall range of about 7.9-13.1 m)
Read the Allosaurus facts panel and click body parts
The Allosaurus facts panel lists length about 8.5 m average (largest confirmed near 9.7 m), hip height about 3 m (published ranges roughly 2.9-4.9 m), weight about 1.5-2.7 tonnes, the 155-143 Mya Late Jurassic (Oxfordian-Tithonian) window mainly in the Morrison Formation of the western United States, and discovery - Othniel Charles Marsh named the genus in 1877 from Garden Park, Colorado. In 2023 the ICZN designated Smithsonian specimen USNM 4734 as the species neotype. Small bony ridges (lacrimal horns) sat above each eye, and each hand carried three clawed fingers - a contrast with Tyrannosaurus rex's reduced two-fingered arms. A short click - not a drag - on the head, an arm, the tail, or a leg surfaces a short fossil fact; click empty space to return to the species sheet. Skin and color are an artistic reconstruction, not a fossil-accurate skeleton. The model is procedural theropod with no free-licensed Allosaurus glTF re-hosted yet.
What the Allosaurus how-to guide is not
The Allosaurus how-to guide is a controls walkthrough for the in-browser viewer only - it does not place the model in your room (no AR), does not claim soft-tissue or color accuracy, does not invent one precise length or weight, does not invent a specific proven prey list, does not invent a glTF credit, and does not invent game score or win states. For the size story see Allosaurus size comparison. For trade-offs versus phone AR apps see Allosaurus 3D viewer vs AR apps.
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