02.01.2008, 11:57
Deadparrot,
IL2 cannot deal with negative, below sea level, heights. You can do the following though.
1. Edited this because after looking at asheshouse post I realised I was talking rubbish. Just set your RGB scale to give -10m a value of RGB greyscale = 0 (this is normaly 0m) when you set the height map colours. You can do this because the water features, sea, lakes and rivers , are determined by map_c, not map_h. Therefore your new sea level will be at RGB = 33, normally +10m, that is if you use my correction curves for MicroDEM. But these may have to be modified again because they are set up for landmasses starting at 0m. You can then have "under sea level" land masses, but his may cause other problems. You only have 256 RGB values in IL2 to decribe land heights between 0 - 4000m, so you may find that on certain maps which have a mix of below sealevel and very high surface features you may be limiting the maximum height of the maps. This is because you have "stolen" RGB values to describe undersea level land heights and IL2 always thinks that 0m is at RGB = 0.
2. Just raise all negative landmasses to sea level, -10 m is not a large difference when flying, and pretend there are no -ve landmasses.
You can have water at any height, this is dictated by map _c. But ensure that your lakes are on level ground otherwise they will look as though they defy gravity. Rivers can be placed going downhill, but if the gradient is too large then the bleed through, water is a semi transparent texture, will allow you to see the land behind it from certain angles.
CW
IL2 cannot deal with negative, below sea level, heights. You can do the following though.
1. Edited this because after looking at asheshouse post I realised I was talking rubbish. Just set your RGB scale to give -10m a value of RGB greyscale = 0 (this is normaly 0m) when you set the height map colours. You can do this because the water features, sea, lakes and rivers , are determined by map_c, not map_h. Therefore your new sea level will be at RGB = 33, normally +10m, that is if you use my correction curves for MicroDEM. But these may have to be modified again because they are set up for landmasses starting at 0m. You can then have "under sea level" land masses, but his may cause other problems. You only have 256 RGB values in IL2 to decribe land heights between 0 - 4000m, so you may find that on certain maps which have a mix of below sealevel and very high surface features you may be limiting the maximum height of the maps. This is because you have "stolen" RGB values to describe undersea level land heights and IL2 always thinks that 0m is at RGB = 0.
2. Just raise all negative landmasses to sea level, -10 m is not a large difference when flying, and pretend there are no -ve landmasses.
You can have water at any height, this is dictated by map _c. But ensure that your lakes are on level ground otherwise they will look as though they defy gravity. Rivers can be placed going downhill, but if the gradient is too large then the bleed through, water is a semi transparent texture, will allow you to see the land behind it from certain angles.
CW