Base color ↗
In a metallic-roughness PBR material, base color provides diffuse reflectance for non-metals and reflectance color for metals.
REFERENCE / A–Z
AI 3D
glossary.
Short definitions for quick orientation. Important concepts link to full Wiki pages with facts, context and related tools.
B
Bounding Box
The smallest axis-aligned box that contains a 3D asset.
D
Decimation
Reducing polygon count while attempting to preserve the visible surface.
DINOv3
A visual feature encoder used in the TRELLIS.2 input pipeline.
DiT
A diffusion transformer architecture used to model latent data.
G
GGUF
A model serialization and quantization ecosystem used by some community workflows.
GLB ↗
GLB is a binary glTF container that can package scene JSON, binary buffers, and images into a single file.
GLTF
A JSON-based 3D transmission format; GLB is its binary container form.
M
Mesh ↗
A mesh is a connected or disconnected collection of vertices and polygon faces that approximates the surface of a 3D object.
Metallic map ↗
In a metallic-roughness workflow, metallic values switch the shading model between non-metal and metal behavior, with intermediate values mainly used at blended boundaries.
O
O-Voxel ↗
O-Voxel is the native structured representation used by TRELLIS.2 to encode geometry and surface attributes without relying on an iso-surface field.
P
PBR ↗
Physically based rendering uses standardized material properties, commonly base color, metallic, and roughness, so surfaces respond consistently to lighting.
Polygon
A flat face, usually triangulated for rendering, that makes up a mesh surface.
R
Remeshing ↗
Remeshing creates a new tessellation of a surface, often to make element size more uniform, repair regions, or prepare another operation.
Retopology ↗
Retopology creates a new surface over an existing shape so its edge flow and density better fit a downstream task.
Roughness map ↗
A roughness map varies microsurface roughness across a material; low values produce sharper reflections and high values spread them more broadly.
S
SC-VAE ↗
SC-VAE is the sparse compression autoencoder in TRELLIS.2 that maps O-Voxel data to and from compact structured latents.
Sparse DiT ↗
A sparse DiT applies transformer-based generative modeling to sparse latent tokens associated with occupied or active 3D locations.
Structured latent ↗
A structured 3D latent stores learned feature vectors at organized spatial locations, preserving more explicit geometry than one global vector.
T
Texture baking ↗
Texture baking projects information such as color, normals, ambient occlusion, or material values onto a target mesh's UV layout.
Topology ↗
Mesh topology describes how vertices, edges, and faces connect, including boundaries, loops, components, and manifold relationships.
TRELLIS ↗
TRELLIS is a Microsoft Research model family that generates 3D assets through a Structured LATent representation known as SLAT.
TRELLIS.2 ↗
TRELLIS.2 is a Microsoft Research image-to-3D model based on a sparse, field-free representation called O-Voxel.
U
UV mapping ↗
UV mapping assigns two-dimensional coordinates to mesh vertices so images can be sampled across the surface.
V
Voxel ↗
A voxel is an element of a 3D grid. Depending on the representation, it can store occupancy, density, distance, color, learned features, or other attributes.
VRAM
GPU-local memory used for model weights, activations, intermediate data and textures.
W
Watertight mesh ↗
A watertight mesh has no open boundary edges, so its surface encloses an inside and outside volume.