The unmarked road in the fog

Normal sudoku rules apply. Place the digits 1-9 once each in every row column, and 3x3 box. The grid is covered in fog, placing a correct digit will clear the fog in the surrounding cells of that digit. No bifurcation necessary. Digits in a dotted cage without repeat, sum to the total in the top left corner of the cage. Cells separated by a black dot has one digit double the other. (1:2 ratio). Clues outside the grid sum the digits in the indicated diagonal, digits may repeat (if other rules allow).