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arXiv · 2603.19500

Teaching an Agent to Sketch One Part at a Time

Xiaodan Du·Ruize Xu·David Yunis·Yael Vinker·Greg Shakhnarovich
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Abstract

We develop a method for producing vector sketches one part at a time. To do this, we train a multi-modal language model-based agent using a novel multi-turn process-reward reinforcement learning following supervised fine-tuning. Our approach is enabled by a new dataset we call ControlSketch-Part, containing rich part-level annotations for sketches, obtained using a novel, generic automatic annotation pipeline that segments vector sketches into semantic parts and assigns paths to parts with a structured multi-stage labeling process. Our results indicate that incorporating structured part-level data and providing agent with the visual feedback through the process enables interpretable, controllable, and locally editable text-to-vector sketch generation.

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Xiaodan Du, Ruize Xu, David Yunis, Yael Vinker, Greg Shakhnarovich. 2026-04-23. Teaching an Agent to Sketch One Part at a Time. https://arxiv.org/abs/2603.19500

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