[agracier]

What would cause that i cant click "Create" button in Map_c toolbox
Do i have to leave lakes and rivers in completely black?

Not being able to ´create´ in the mapC_toolbox can have any number of reasons.

One of my recurring mistakes in the sizing of the maps, starting with the very basic color and gray dems. They have to be sized in multiples of 32 pixels, both in height and width, starting with the smallest size map and going upwards ... if you´re off by even 1 teensy pixel then the map(s) won´t load or one of the utilities like mapC_toolbox may not recognize the map you are choosing either (in this case it could be either my_mapC.tga or map_h.tga).

The colors of the rivers, lakes and ocean in my_mapC.tga have no bearing on mapC_toolbox working or not. Even if you were to draw your rivers and water in red, map_Toolbox will recognize a correctly sized map - but you will get an utterly ridiculous placement of water ... If you draw water in white, you will simply get a map without water.

I would bet that there is something amiss in the pixel size of your maps. Check that they are all multiples of 32 pixels on all sides.