A collaboration organized by Hiro Japan and Gacchi 3DCG where various animators created short 3D Sousou no Frieren clips which were then compiled into a large fan movie.
Part 1: YouTube: 葬送のフリーレン アニメ公開記念ファンムービー Part 2: YouTube: 葬送のフリーレン ファンムービー 第2弾