Conventions
Summary Table
| Blender | 3ds Max | Maya | glTF | Verge3D |
|---|---|---|---|---|
| Coordinate System | ||||
| X - right, Y - far, Z - up | X - right, Y - up, Z - near (OpenGL) | |||
| 2D Textures (UV) | ||||
| (0, 0) bottom left corner | ? | (0, 0) upper left corner |
(0, 0) upper left corner Image/Video/Canvas and disabled flipping |
|
| Normal Map | ||||
|
R [0, 255] - X [-1, 1] G [0, 255] - Y [-1, 1] B [0, 255] - Z [0, 1] X - right, Y - up, Z - near (OpenGL) |
R [?, ?] - X [?, ?] G [?, ?] - Y [?, ?] B [?, ?] - Z [?, ?] X - right, Y - down, Z - near (DirectX) |
R [?, ?] - X [?, ?] G [?, ?] - Y [?, ?] B [?, ?] - Z [?, ?] X - right, Y - up, Z - near (OpenGL) |
R [0, 255] - X [-1, 1] G [0, 255] - Y [-1, 1] B [128, 255] - Z [1/255, 1] X - right, Y - up, Z - near (OpenGL) |
? |
| Cube Map | ||||
|
| Left -X | Back -Y | Right +X | | Down -Z | Up +Z | Forward +Y | |
? | ? | ? |
OpenGL: 0 GL_TEXTURE_CUBE_MAP_POSITIVE_X 1 GL_TEXTURE_CUBE_MAP_NEGATIVE_X 2 GL_TEXTURE_CUBE_MAP_POSITIVE_Y 3 GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 4 GL_TEXTURE_CUBE_MAP_POSITIVE_Z 5 GL_TEXTURE_CUBE_MAP_NEGATIVE_Z ... with +X and -X swapped |
| Equirectangular Map | ||||
| ? | ? | ? | Generic 2D texture | ? |