As I have mentioned previously, triggers are not supposed to modify stuff like this, as they are often done better with alternate methods (which is true in this case especially).
In RE you can define a specific texture as having a modified "coastscale". In your map config, use "texcoastscale" after your texture definition, or "/vcoastscale" in the editor and "/replace" to modify all instances of the currently selected texture. The parameter for this is a floating point value from "0.0" to "1000.0", which is multiplied against the "floorcoast" value for the map. Eg. to get a quarter of the current "floorcoast" use "texcoastscale 0.25".
I might copy this to the SRE thread.
Quinton Reeves | Lead Developer, Red Eclipse
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