Add test sample spheres #86
Description
add test sample like https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/MetalRoughSpheresNoTextures
Textures
- diffuse
- emissive
- bump
- shade
- receiveShadow
- shadingGrade
- rim
- matCap
- outlineWidth
- uvAnimationMask
Colors
- diffuse
- ambient
- emissive
- shade
- rim
- outline
Parameters
- bumpScale
- receiveShadowRate
- shadingGradeRate
- shadeShift
- shadeToony
- lightColorAttenuation
- rimLightingMix
- rimFresnelPower
- rimLift
- outlineWidth
- outlineScaledMaxDistance
- outlineLightingMix
- uvAnimationScrollX
- uvAnimationScrollY
- uvAnimationRotation
- outlineWidthMode
- cullMode