Adding new materials to a model & Advanced material editing.

[trillonix]

1. Option to add a new material to a model, and atop of or beneath an existing one, with option to layer them maybe. Like adding a [New material] button to the context menu material grid, and also a similar 'Add material' option when player right clicks one of the materials in the grid to add a new material atop of existing one.

2. Advanced material editing options, like from Advanced Material | REBORN addon. Options such as stretching, tilting, resizing, and overall positioning a material in any way possible using sliders.

[vlazed]

1. Models are locked to their materials, so it isn't possible to add any more materials to the submaterial grid if that's what you mean. As for layering, I can see this involving a complex system of render operations. I could consider this, but in the end, I'd rather have this tool interface with existing, robust systems, rather than add more complexity to it.
2. I could make this a feature, similarly to there being support for Advanced Colours. I'll look into this in more detail.