  Generating and editing a 3D scene guided by natural language poses a
challenge, primarily due to the complexity of specifying the positional
relations and volumetric changes within the 3D space. Recent advancements in
Large Language Models (LLMs) have demonstrated impressive reasoning,
conversational, and zero-shot generation abilities across various domains.
Surprisingly, these models also show great potential in realizing and
interpreting the 3D space. In light of this, we propose a novel language-guided
interactive 3D generation system, dubbed LI3D, that integrates LLMs as a 3D
layout interpreter into the off-the-shelf layout-to-3D generative models,
allowing users to flexibly and interactively generate visual content.
Specifically, we design a versatile layout structure base on the bounding boxes
and semantics to prompt the LLMs to model the spatial generation and reasoning
from language. Our system also incorporates LLaVA, a large language and vision
assistant, to provide generative feedback from the visual aspect for improving
the visual quality of generated content. We validate the effectiveness of LI3D,
primarily in 3D generation and editing through multi-round interactions, which
can be flexibly extended to 2D generation and editing. Various experiments
demonstrate the potential benefits of incorporating LLMs in generative AI for
applications, e.g., metaverse. Moreover, we benchmark the layout reasoning
performance of LLMs with neural visual artist tasks, revealing their emergent
ability in the spatial layout domain.
