Automatic downscaled textures can be now specific to a platform

[DP News-Robot]

We improve the process of automatic texture downscaling. The automatic downscaling is determined by data/material_properties.xml file and documented here. The new features are: Ability to specify any set of scales, not necessarily a continuous range. Ability to specify that some scale values are packaged only for particular platforms. E.g. scale 3 (which means that each …