Oil, Water, Skyscrapers

Normal sudoku rules apply.

Digits in the grid represent the heights of skyscrapers, and clues outside the grid indicate the number of skyscrapers visible in the corresponding row or column.

Digits in cages do not repeat.

Each cage is either full of "oil" (even digits), full of "water" (odd digits), or a mix of both. In all cases, each "row" within a cage is of just one type (oil or water). Oil floats on water, so even digits will always be in rows above odd digits in mixed cages.