Re: Height Maps
Pavement originally flattened the terrain to 0, and was used so that patches of city grid were absolutely flat. So you got that SP1 and SP2 effect of a little sunken village of 2-3 houses "buried" in a ridge...
We let pavement flow over terrain as part of our freeing up of fields etc (They only could be laid on level 0 flatland in the original SSI games).
Pavement still serves the same function of smoothing off an urbanised area, if not as markedly as it once did (it as I said, follows terrain contouring now).
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