GefjunScene 1.0.1 · generated 2026-10-31T15:03:49 UTC

GefjunScene preflight: BarStool_before

Verdict: NOT READY — 11 fail, 4 warning, 1 info, 9 pass (profile: Amazon View in 3D / View in Your Room 2026.10)

Review next

6 review topics need attention. Change the Blender scene where applicable, then export and check the GLB again.

FAIL · Product placement
glTF viewers place Y=0 (Blender Z=0) on the shopper's floor.

Blender fixes: Place on floor at origin

glb · GLB-BOUNDS: Product bottom is at Y=0.0500 m, not on the floor (Y=0)

scene · PLC-FLOOR: Lowest point is at Z=0.0500 m, not on the floor
FAIL · Unsupported material extensions
This extension is not on the profile's allowlist. Set Anisotropic to 0.

Blender fixes: Clear extension inputs, Reset glTF specular

Where: Black Steel, Oak Seat

glb · GLB-EXT: Unsupported glTF extensions: KHR_materials_anisotropy, KHR_materials_specular

scene · MAT-EXT: Material 'Black Steel' uses Anisotropic, which exports KHR_materials_anisotropy — Black Steel

scene · MAT-SPECULAR: 1 material(s) will export KHR_materials_specular — Oak Seat
FAIL · Missing material maps
The profile requires Base Color and Metallic/Roughness maps. Values are plain, so 'Add constant PBR maps' can bake them into PNGs.

Blender fixes: Add constant PBR maps

Where: Oak Seat, Black Steel

glb · GLB-MAPS: Material 'Oak Seat' has no metallicRoughnessTexture — Oak Seat

glb · GLB-MAPS: Material 'Black Steel' has no baseColorTexture or metallicRoughnessTexture — Black Steel

scene · MAT-MAPS: Material 'Black Steel' has no texture on Base Color, Metallic, Roughness — Black Steel

scene · MAT-MAPS: Material 'Oak Seat' has no texture on Metallic, Roughness — Oak Seat
FAIL · Texture dimensions
Used by Oak Seat.

Blender fixes: Square power-of-two textures

Where: oak_seat_3000x2000, oak_seat_3000x2000.jpg

glb · GLB-TEX: Image 'oak_seat_3000x2000': 3000x2000 is not square; 3000x2000 is not a power of two — oak_seat_3000x2000

scene · TEX-SIZE: Image 'oak_seat_3000x2000.jpg' 3000x2000: not square, not a power of two — oak_seat_3000x2000.jpg
WARN · Double-sided materials
Blender's Backface Culling is off by default, which the exporter writes as doubleSided:true.

Blender fixes: Make single-sided

Where: Oak Seat, Black Steel

glb · GLB-DOUBLE: 2 double-sided material(s): Oak Seat, Black Steel — Oak Seat, Black Steel

scene · MAT-DOUBLE: 2 material(s) will export as double-sided — Black Steel, Oak Seat
WARN · UV layout
Pack the islands into the 0-1 square (one atlas).

Where: Seat

glb · GLB-UV: UVs reach outside 0-1 (U -0.000..1.231, V 0.000..1.000)

scene · UV-RANGE: UVs outside 0-1 on 1 object(s) — Seat

Delivery facts

Measured values for the client handoff
Blender file	bar_stool_problem.blend
Blender	4.5.14 LTS
Export set	collection 'BarStool'
Listing dimensions (W × D × H)	38 × 38 × 78 cm (tolerance 3.0%)
Placement	floor
Scene triangles (evaluated)	2,924
Scene size (Blender X × Y × Z)	W 0.38 m (38.0 cm / 14.96 in) × D 0.38 m (38.0 cm / 14.96 in) × H 0.78 m (78.0 cm / 30.71 in)
GLB file	BarStool_before.glb
GLB size	0.81 MB (806,728 bytes)
GLB SHA-256	564b441563733442e15c3265555a0264b60b97da8acfd08251cb1df0793255fb
GLB triangles	2,924
GLB dimensions (glTF X × Z × Y)	W 0.38 m (38.0 cm / 14.96 in) × D 0.38 m (38.0 cm / 14.96 in) × H 0.78 m (78.0 cm / 30.71 in)
Extensions	KHR_materials_anisotropy, KHR_materials_specular
Textures	oak_seat_3000x2000 3000×2000 image/jpeg
Materials / meshes / nodes	2 / 6 / 6
Generator	Khronos glTF Blender I/O v4.5.51

Blender scene checks (before export)

11 result(s)
Result	Check	Finding	Where	What to do
✖ FAIL	`MAT-EXT`	Material 'Black Steel' uses Anisotropic, which exports KHR_materials_anisotropy	material Black Steel	This extension is not on the profile's allowlist. Set Anisotropic to 0. GefjunScene fix: clear ext inputs.
✖ FAIL	`MAT-MAPS`	Material 'Black Steel' has no texture on Base Color, Metallic, Roughness	material Black Steel	The profile requires Base Color and Metallic/Roughness maps. Values are plain, so 'Add constant PBR maps' can bake them into PNGs. GefjunScene fix: constant maps.
✖ FAIL	`MAT-MAPS`	Material 'Oak Seat' has no texture on Metallic, Roughness	material Oak Seat	The profile requires Base Color and Metallic/Roughness maps. Values are plain, so 'Add constant PBR maps' can bake them into PNGs. GefjunScene fix: constant maps.
✖ FAIL	`MAT-SPECULAR`	1 material(s) will export KHR_materials_specular	material Oak Seat	Specular IOR Level is not 0.5, Specular Tint is not white, or a texture drives them. Amazon rejects this extension ('Unsupported extensions found: KHR_materials_specular'). GefjunScene fix: reset specular.
✖ FAIL	`PLC-FLOOR`	Lowest point is at Z=0.0500 m, not on the floor		glTF viewers place Y=0 (Blender Z=0) on the shopper's floor. GefjunScene fix: floor origin.
✖ FAIL	`TEX-SIZE`	Image 'oak_seat_3000x2000.jpg' 3000x2000: not square, not a power of two	image oak_seat_3000x2000.jpg	Used by Oak Seat. GefjunScene fix: pot textures.
▲ WARN	`MAT-DOUBLE`	2 material(s) will export as double-sided	material Black Steel, material Oak Seat	Blender's Backface Culling is off by default, which the exporter writes as doubleSided:true. GefjunScene fix: single sided.
▲ WARN	`UV-RANGE`	UVs outside 0-1 on 1 object(s)	object Seat	Pack the islands into the 0-1 square (one atlas).
ℹ INFO	`SET-EXCLUDED`	2 camera/light object(s) will be left out of the GLB	object ProductCam, object KeyLight	GefjunScene exports without cameras and lights.
✔ PASS	`DIM-MATCH`	Size matches the listing within 3.0%		width 0.38 m (38.0 cm / 14.96 in) vs 0.38 m (38.0 cm / 14.96 in) (-0.0%); depth 0.38 m (38.0 cm / 14.96 in) vs 0.38 m (38.0 cm / 14.96 in) (-0.0%); height 0.78 m (78.0 cm / 30.71 in) vs 0.78 m (78.0 cm / 30.71 in) (+0.0%)
✔ PASS	`GEO-TRIS`	2,924 triangles after modifiers

Exported GLB checks

14 result(s)
Result	Check	Finding	Where	What to do
✖ FAIL	`GLB-BOUNDS`	Product bottom is at Y=0.0500 m, not on the floor (Y=0)		Use 'Place on floor at origin' in Blender before exporting.
✖ FAIL	`GLB-EXT`	Unsupported glTF extensions: KHR_materials_anisotropy, KHR_materials_specular		Not on this profile's allowlist: KHR_materials_anisotropy, KHR_materials_specular. In Blender this comes from a Principled BSDF whose Specular IOR Level is not 0.5 or whose Specular Tint is not white; use the 'Reset glTF specular' fix and export again.
✖ FAIL	`GLB-MAPS`	Material 'Oak Seat' has no metallicRoughnessTexture	material Oak Seat	Texture Base Color, Metallic and Roughness in Blender, or use 'Add constant PBR maps' for plain-valued materials.
✖ FAIL	`GLB-MAPS`	Material 'Black Steel' has no baseColorTexture or metallicRoughnessTexture	material Black Steel	Texture Base Color, Metallic and Roughness in Blender, or use 'Add constant PBR maps' for plain-valued materials.
✖ FAIL	`GLB-TEX`	Image 'oak_seat_3000x2000': 3000x2000 is not square; 3000x2000 is not a power of two	image oak_seat_3000x2000	Use the 'Square power-of-two textures' fix in Blender, or resize the source image.
▲ WARN	`GLB-DOUBLE`	2 double-sided material(s): Oak Seat, Black Steel	material Oak Seat, material Black Steel	In Blender, turn on Backface Culling (the 'Make single-sided' fix).
▲ WARN	`GLB-UV`	UVs reach outside 0-1 (U -0.000..1.231, V 0.000..1.000)		Pack UVs into the 0-1 square (one atlas).
✔ PASS	`GLB-ANIM`	No animations
✔ PASS	`GLB-CAMERAS`	No cameras
✔ PASS	`GLB-DIMS`	Dimensions match the listing within 3.0%		width 0.38 m (38.0 cm / 14.96 in) vs 0.38 m (38.0 cm / 14.96 in) (-0.0%); depth 0.38 m (38.0 cm / 14.96 in) vs 0.38 m (38.0 cm / 14.96 in) (-0.0%); height 0.78 m (78.0 cm / 30.71 in) vs 0.78 m (78.0 cm / 30.71 in) (+0.0%)
✔ PASS	`GLB-HEADER`	GLB container and JSON chunk are well formed
✔ PASS	`GLB-LIGHTS`	No lights
✔ PASS	`GLB-SIZE`	File size 0.81 MB
✔ PASS	`GLB-TRIS`	2,924 triangles

Profile and sources

Amazon View in 3D / View in Your Room (id amazon-view-in-3d, version 2026.10). Built from public summaries of Amazon's Seller Central '3D model technical requirements' and from rejection messages quoted on Amazon Seller Forums. Amazon's own page is behind Seller Central and may change; edit a copy of this profile when your seller receives different rules. Passing does not guarantee acceptance: Amazon also reviews realism by hand.

https://sellercentral.amazon.com/seller-forums/discussions/t/5369e5bc-b31e-4655-9c32-dd3d4e5c213e — ~2023 (Amazon staff reply; verified 2026-10-01); used for: Amazon staff's list of supported glTF extensions
https://maverickframe.com/blog/3d-model-requirements-amazon-wayfair-shopify/ — 2026-07-31; used for: triangles, texture size/square/power of two, maps, Y-up, floor, no cameras/lights/animation, no double-sided
https://www.vntana.com/resource/amazon-integration/ — undated (read 2026-10-01); used for: allowed glTF extensions, 75k recommended triangles, UVs in 0-1
https://sellercentral.amazon.co.uk/seller-forums/discussions/t/3200b156-abf3-492a-a860-7ea0a529681a — ~2024; used for: hard limit 1,000,000 triangles; 150k-200k expected
https://sellercentral.amazon.in/seller-forums/discussions/t/d30a6309-1e89-453a-a7c5-e1337a3fb1c5 — 2023-10-11; used for: rejection 'Unsupported extensions found: KHR_materials_specular'
https://blog.neural4d.com/image-to-3d/3d-product-rendering-for-ecommerce-amazon-glb-guide-2026/ — 2026-08; used for: 5 MB file size (advisory only: other sources say no published limit)