Just by removing the normal textures.
Combine that with a square minimap with the same outer shadow and you are ready to roll.
There we go (qMinimap hacked)
Even the tooltip stands no chance:
The setup that does this is:
Lua Code:
backdrop = {
bgFile = "Interface\\Buttons\\WHITE8x8",
edgeFile = "Interface\\Tooltips\\UI-Tooltip-Border",
tile = false,
tileSize = 32,
edgeSize = 6,
insets = { left = 6, right = 6, top = 6, bottom = 6 },
},
The border texture (edgeFile) is the outer shadow found in rActionButtonStyler.