Solid color mode gives minimal colors

[erich666]

The docs here https://www.realtimerendering.com/erich/minecraft/public/mineways/mineways.html#terrain_png note:

"Export solid material colors" will give solid swatches of color for each material. The color scheme's colors controls these. Note that this will give just generic "what's this block's standard color" type colors, mostly useful for previewing. If you want colors more in keeping with what the blocks actually look like, you'll want to use one of the next three options. For solid colors in a texture, note that Mineways comes with terrainExt_Solid.png and terrainExt_SolidCutouts.png choices, which you can select before exporting by using File | Choose Terrain File.

There's no reason that the solid color export mode shouldn't act exactly like the texture mode, but instead of outputting a texture a color is output instead. If anything, this should cut out some code: the solid texture code would run through the same paths as the texture code, but instead of the MTL file having each material point to a texture (or textures, for PBR), it would just use a color instead. For each texture patch we'd compute (on the fly, so that custom textures could be used) an output color and cache that color, in case a texture was reused among a few materials (as wood planks are, for example).