This document discusses challenges of sharing 3D cultural heritage content through Europeana. It notes that while file sizes were previously too large, HTML5 and WebGL have enabled real-time streaming of 3D models in browsers. However, the 50+ file formats used present standardization challenges. Europeana relies on adoption of standard media players to provide a good user experience. The document advocates for high-quality metadata and dissemination strategies to make 3D cultural heritage models more findable, accessible, and reusable.