This paper proposes a sketch-based interface to interactively design 3D voxel game stages. Given the mouse-drag operations, our system automatically computes the corresponding 3D locations from the visible voxel surface and the base grid to place or delete blocks one-by-one. Our method integrates seamlessly into existing modeling tools. We demonstrate the robustness of our system through a variety of modeling results. In addition, we conducted a user study and validated that our system is effective for realizing game stage designs as envisioned by users.
This work was supported by JSPS KAKENHI Grant Number  JP24K20910 and JST, BOOST, Grant Number JPMJBY24D6.
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