3DTopia-XL is a high-quality 3D asset generation technology built on the Diffusion Transformer (DiT), utilizing a novel 3D representation method called PrimX. This technology encodes 3D shapes, textures, and materials into a compact N x D tensor, where each element represents a volumetric primitive anchored to the surface of the shape, encoding signed distance fields (SDF), RGB, and materials through voxelized payloads. This process generates 3D PBR assets from text/image inputs in just 5 seconds, suitable for graphics pipelines.