DreamMat is an innovative model that generates physically-based rendering (PBR) materials for 3D meshes based on text prompts. It addresses the shortcomings of existing 2D diffusion models in material decomposition, producing high-quality PBR materials that are consistent with the given geometry and lighting environment while devoid of built-in shadows. This technology holds significant importance for downstream tasks such as game and film production, as it can substantially elevate rendering quality and enhance the visual experience for users.