Recent advances in implicit neural representations have made them a popular choice for modeling 3D geometry, achieving impressive results in tasks such as shape representation, reconstruction, and learning priors. However, directly editing these representations poses challenges due to the complex relationship between model weights and surface regions they influence. Among such editing tools, sculpting, which allows users to interactively carve or extrude the surface, is a valuable editing operation to the graphics and modeling community. While traditional mesh-based tools like ZBrush facilitate fast and intuitive edits, a comparable toolkit for sculpting neural SDFs is currently lacking. We introduce a framework that enables interactive surface sculpting edits directly on neural implicit representations. Unlike previous works limited to spot edits, our approach allows users to perform stroke-based modifications on the fly, ensuring intuitive shape manipulation without switching representations. By employing tubular neighborhoods to sample strokes and custom brush profiles, we achieve smooth deformations along user-defined curves, providing precise control over the sculpting process. Our method demonstrates that intricate and versatile edits can be made while preserving the smooth nature of implicit representations.

翻译：隐式神经表示的最新进展使其成为三维几何建模的热门选择，在形状表示、重建及先验学习等任务中取得了令人瞩目的成果。然而，由于模型权重与其影响的表面区域之间存在复杂关联，直接编辑此类表示仍面临挑战。在各类编辑工具中，雕刻——允许用户交互式地雕刻或挤出表面——对图形与建模领域而言是一项极具价值的编辑操作。尽管传统基于网格的工具（如ZBrush）能够实现快速直观的编辑，但目前仍缺乏可与之媲美的神经符号距离场雕刻工具包。本文提出一个可直接在神经隐式表示上进行交互式表面雕刻编辑的框架。与先前局限于局部点编辑的工作不同，我们的方法允许用户实时执行基于笔触的修改，确保在不切换表示形式的前提下实现直观的形状操控。通过采用管状邻域对笔触进行采样并定制笔刷轮廓，我们能够沿用户定义的曲线实现平滑形变，从而为雕刻过程提供精确控制。我们的方法表明，在保持隐式表示平滑特性的同时，仍可完成精细且多样化的编辑操作。