Importing

Drag files onto the viewport, or use the import button in the toolbar.

Meshes

Format	How it's handled
.glb	Loaded directly
.obj	Converted to GLB on import
.fbx	Converted to GLB on import

Everything downstream of import — storage, thumbnails, name handling — speaks GLB only, so foreign formats are converted once at the door rather than teaching every part of the viewer a second language.

Size caps

	Cap
Mesh	50 MB
Texture	20 MB

The mesh ceiling matches the figure most people already know from Sketchfab. Textures cap lower because decoded GPU size scales with pixel count, and 20 MB is already the 4K–8K range. Above 20 MB, an OBJ or FBX takes long enough to convert that you get a warning before it starts.

What conversion preserves

• Material slots survive. Names and per-face assignments are kept along with their UVs, so M_Body stays M_Body and stays separately texturable.
• Material look is translated — color, scalar values, and any texture that actually decoded, which for FBX means embedded images.
• Node transforms are baked into the vertices, so FBX centimeter units cost you nothing.
• Geometry is optimized: attributes trimmed to position, normal and UV; duplicate vertices welded; everything sharing a material merged into one mesh. That means one draw call per material slot.

What conversion drops

• Externally referenced textures. Only the file you dropped crosses into the browser, so an OBJ pointing at body_diffuse.png on disk arrives without it. Load those maps yourself in the texture panel — that's what it's for.
• Lights, cameras, and empty nodes. The viewer supplies its own lighting and camera.
• Vertex colors, skinning, and morph targets, which are baggage for a static preview.

Textures

.png, .jpg, .jpeg, and .webp, into any of ten channels:

Channel	Suffix	Color space
Base Color	BC	sRGB
Metalness	M	Linear
Roughness	R	Linear
Specular Map	S	sRGB
Normal Map	N	Linear
AO Map	AO	Linear
Opacity Map	O	Linear
Emission Map	E	sRGB
Clear Coat	CC	Linear
Clear Coat Roughness	CCR	Linear

Every material is upgraded to a physical material on load, so the clear coat and specular slots always exist even if the source file never had them.

Dropping a folder of maps

Drop many files at once and they sort themselves onto the right materials by filename. The convention is that a material's textures share its stem and carry a channel suffix — so material M_Body takes T_Body_BC as base color, T_Body_R as roughness, and so on.

The matching is deliberately forgiving:

• Prefixes are optional. M_, T_, Tex_, Material_ are all treated as kind markers and dropped.
• Separators and case don't matter. body-bc.png, T_Body_BC.png, and T Body BC.png all land in the same place.
• A leading mesh name is ignored. T_Hellcat_Body_BC still resolves to M_Body, because that prefix is organizational rather than addressing.
• Trailing tags are ignored. Suffixes are scanned from the right, so T_Car_Body_BC_2K.png matches on BC and _2K is harmless.

The upshot is that maps exported from any DCC with any house naming style will usually sort without renaming a thing.

Where your files live

Nothing is uploaded. Meshes, background images, and channel textures are held in your browser's local database, so what you were looking at is still there when you come back — and it never leaves your machine.

Next: render modes.