From AlternativaPlatform Wiki
[edit] Introducing
At this article are described the requirements for 3D-model. You should consider these requirements when you work with Alternativa3D. Requirements may be changed because the engine is constantly being improved.
[edit] Geometry and objects
| Option \ restriction
| Value
| Additionally
|
| Maximum number of vertices in object
| 65000
| For one object
|
| Maximum number of triangles
| 65000
| For one object
|
| Maximum number of objects at scene
| 32767
| This limit depends on the number of drawcalls. It may be less, depending on:
- type of objects
- type of using materials
- number of surfaces
|
| Maximum number of unique Geometry
| 4096
| This limit follows from the Stage3D limits
|
[edit] Characters
| Option \ restriction
| Value
| Additionally
|
| Maximum number of bone influences to the vertex
| 8
|
|
| Characters with a large number of bones break apart after the loading
|
|
|
| Maximum number of bones to the part
| 33
| depends on the type of material used
|
[edit] Texturing
| Option \ restriction
| Value
| Additionally
|
| Maximum number of UV-channels in model
| 8
| value will decrease
|
| Supported textures formats
| JPG, PNG, GIF (without animation)
| This requires save them using Flash CS or using decoders for additional formats.
|
| Maximum texture size
| 2048x2048
| Limit of Molehill
|
| Texture size
| power of two (2^n)
| For example, 2x8, 256x256, 2048x1024
|
[edit] Available maps
| Option \ restriction
| Value
| Additionally
|
| Color
| diffuse map
|
|
| Transparency
| opacity map
|
|
| Normals map
| in TANGENT space or in OBJECT space
|
|
| Specular map
| specular map
|
|
| Glossiness map
| glossiness map, shininess map
|
|
[edit] Transparency
| Option \ restriction
| Value
| Additionally
|
| Transparent objects are sorted each other
|
|
|
| Facets of transparent objects are not sorted and might conflict with each other
|
| For conflicts resolving you can:
- decrease the transparent areas by separation on the surfaces
- use alpha-test on rendering
|
[edit] Lighting
[edit] Types of light sources
| Option \ restriction
| Value
| Additionally
|
| Ambient
| AmbientLight
|
|
| Directional
| DirectionalLight
|
|
| Point
| PointLight
|
|
| Сonical
| SpotLight
|
|
[edit] Restrictions on lighting
| Option \ restriction
| Value
| Additionally
|
| Maximum number of light sources effects to a single object
| 6
| Not for AmbientLight (any number of AmbientLight)
|
| The affected area of Ambient light
| All space
|
|
| The affected area of Directional light
| All space
|
|
| The affected area of Point light
| End of Point Light attenuation
|
|
| The affected area of Spot light
| Spotlight is bounded by box
|
|
| For lighting on normals map in TANGENT space, object must has tangents and vertices normals
|
|
|
