  Recently, 3D understanding has become popular to facilitate autonomous agents
to perform further decisionmaking. However, existing 3D datasets and methods
are often limited to specific tasks. On the other hand, recent progress in
Large Language Models (LLMs) and Multimodal Language Models (MLMs) have
demonstrated exceptional general language and imagery tasking performance.
Therefore, it is interesting to unlock MLM's potential to be 3D generalist for
wider tasks. However, current MLMs' research has been less focused on 3D tasks
due to a lack of large-scale 3D instruction-following datasets. In this work,
we introduce a comprehensive 3D instructionfollowing dataset called M3DBench,
which possesses the following characteristics: 1) It supports general
multimodal instructions interleaved with text, images, 3D objects, and other
visual prompts. 2) It unifies diverse 3D tasks at both region and scene levels,
covering a variety of fundamental abilities in real-world 3D environments. 3)
It is a large-scale 3D instruction-following dataset with over 320k
instruction-response pairs. Furthermore, we establish a new benchmark for
assessing the performance of large models in understanding multi-modal 3D
prompts. Extensive experiments demonstrate the effectiveness of our dataset and
baseline, supporting general 3D-centric tasks, which can inspire future
research.
