Thank you Wjbender.

However, I think I figured out why I kept getting the terrain_get_z error. I had this code in my main() function:

Code:
function main()
{
   ...

   level_terrain = level_ent; // CAUSING terrain_get_z ERROR WHEN REGION IS  PRESENT.
   terrain_tile(level_terrain); // CAUSING terrain_get_z ERROR WHEN REGION IS PRESENT.

   ...
}


When I commented out this code, I no longer get the terrain_get_z error, even if I have a region in my WED file.

I will try to make the region method work. If it does not, I will try your water_block() action method. Thank you.

Last edited by Ruben; 07/03/15 16:42.