Tile graphics dimensions unclear

[BrainGamer_]

I'm trying to understand how tile graphics work but there are some things that are currently only guessable (or I couldn't find it).

• TileSprite appears to expect a 8x8 tile big graphic (256x256 @ scale 1) but thats not mentioned anywhere? (so graphic size is 256*count x 256, as long as that fits in 1 line)
• TileSpriteWithProbability has described how width/height is calculated but I think it could be phrased a bit more clearly that the size only affects the total width (unless it does not?)