3D Scene

Open World Built from Scratch in Unreal Engine

Shikhar

@xikhar · 9.2K followers

2.2Klikes

227.7Kviews

77reposts

693bookmarks

Oct 18, 2026

View original post ↗

Shikhar used Claude Opus 5.5 to build a massive open world entirely from scratch in Unreal Engine — and the result looks like a AAA RPG. You're seeing a cloaked warrior walking a dirt path through an autumn forest: volumetric god rays pierce the canopy, wildflowers carpet the hillside in yellow and purple, and a medieval banner stands in the misty distance. The geometry, foliage density, and lighting are all production-quality. A month after release, Opus 5.5 is still making this kind of world-building feel achievable solo.

Photorealistic Unreal Engine 5 open world built solo with AI assistance — volumetric lighting, dense foliage, and full character traversal
Medieval fantasy aesthetic with a cloaked protagonist, faction banners, and a hand-crafted trail winding through autumn woodland
Creator notes it was "impossible last year" — a benchmark moment for AI-assisted game world creation

“Opus 5.5 is almost a month old, and it still blows my mind. Building this huge world from scratch in Unreal Engine. This was impossible last year. This will feel trivial next year.”
— @xikhar

unreal-engine 3d-world game-dev open-world real-time-rendering 3d photography-led bold-typography