Sorry, Eric, but I'm not the one to ask. I've never used SBuilderX for that. GHD is the person who said that he used it to create coastlines. If I knew, I'd be more than happy to help.Rich

In thinking about when I've used SBuilderX in the past, I don't think it creates layers. You simply draw one polygon, etc, over the next. So you'd create the coastline poly and, then, the deepwater poly all on the same layer and export them in a format that FSET can use? Just not sure what that would be. Unfortunately, I'm away from my home computer and can't check any of this out.Rich

Hi Eric,I've given you a step by step guide how to create hydro-polys at FsDeveloper.I don't use KML with FSET, I create separate blend and water masks from the FSET bmp and modify the resample .iniIn this example the blend and water mask tiffs are the same since the area doesn't impinge on the default scenery.BMP from FSETTIFFModified .ini

[Destination]DestDir	            = G:\FSEarthTiles\Scenery\Calais\sceneryDestBaseFileName     =  Area_Lp1_SnapOff_N050583776_N050524290_E001440798_E001592506BuildSeasons 		= 0UseSourceDimensions 	= 1CompressionQuality   = 100[source]Type            = MultiSourceNumberOfSources = 3[source1]Type	      = BMPLayer	      = ImagerySourceDir  = .SourceFile = Area_Lp1_SnapOff_N050583776_N050524290_E001440798_E001592506.bmpLon               = 1.73553943634033       ;for top left and bottom right is: 1.99029922485352Lat               = 50.9771633148193       ;for top left and bottom right is: 50.8785760402679NumOfCellsPerLine = 17809       ;Pixel is not used in FSXNumOfLines        = 9189       ;Pixel is not used in FSXCellXdimensionDeg = 1.43051147460938E-05CellYdimensionDeg = 1.07288360595703E-05PixelIsPoint      = 0SamplingMethod    = PointChannel_BlendMask     = 2.0Channel_LandWaterMask = 3.0[source2]Type	      = TIFFLayer	      = NoneSourceDir  = .SourceFile = Area_Lp1_SnapOff_N050583776_N050524290_E001440798_E001592506_BLEND.tifLon               = 1.73553943634033       ;for top left and bottom right is: 1.99029922485352Lat               = 50.9771633148193       ;for top left and bottom right is: 50.8785760402679NumOfCellsPerLine = 17809       ;Pixel is not used in FSXNumOfLines        = 9189       ;Pixel is not used in FSXCellXdimensionDeg = 1.43051147460938E-05CellYdimensionDeg = 1.07288360595703E-05PixelIsPoint      = 0SamplingMethod    = Point[source3]Type	      = TIFFLayer	      = NoneSourceDir  = .SourceFile = Area_Lp1_SnapOff_N050583776_N050524290_E001440798_E001592506_WATER.tifLon               = 1.73553943634033       ;for top left and bottom right is: 1.99029922485352Lat               = 50.9771633148193       ;for top left and bottom right is: 50.8785760402679NumOfCellsPerLine = 17809       ;Pixel is not used in FSXNumOfLines        = 9189       ;Pixel is not used in FSXCellXdimensionDeg = 1.43051147460938E-05CellYdimensionDeg = 1.07288360595703E-05PixelIsPoint      = 0SamplingMethod    = Point