OsSetTerrainTextureHeight

// Default Terrain Textures by djphil 2018
 
default
{
    state_entry()
    {
        osSetTerrainTexture(0, "b8d3965a-ad78-bf43-699b-bff8eca6c975");
        osSetTerrainTextureHeight(0, 10.0, 60.0);
        osSetTerrainTexture(1, "abb783e6-3e93-26c0-248a-247666855da3");
        osSetTerrainTextureHeight(1, 10.0, 60.0);
        osSetTerrainTexture(2, "179cdabd-398a-9b6b-1391-4dc333ba321f");
        osSetTerrainTextureHeight(2, 10.0, 60.0);
        osSetTerrainTexture(3, "beb169c7-11ea-fff2-efe5-0f24dc881df2");
        osSetTerrainTextureHeight(3, 10.0, 60.0);
    }
}

// Terrain elevation animation
 
float gTimerInterval = 5.0;  // Timer interval in seconds
float gTimerDelay = 5.0;  // Start the timer after 5 seconds
float gMinHeight = 5.0;
float gMaxHeight = 55.0;
float gStep = 1.0;
integer gDirection = 1;  // 1 for ascent, -1 for descent
 
default
{
    state_entry()
    {
        llSetTimerEvent(gTimerDelay);
    }
 
    timer()
    {
        // Set the height of the current terrain texture
        osSetTerrainTextureHeight(0, gMinHeight, gMaxHeight);
        osSetTerrainTextureHeight(1, gMinHeight, gMaxHeight);
        osSetTerrainTextureHeight(2, gMinHeight, gMaxHeight);
        osSetTerrainTextureHeight(3, gMinHeight, gMaxHeight);
 
        // Change the min and max height for the next interval
        gMinHeight += gStep * gDirection;
        gMaxHeight += gStep * gDirection;
 
        // Check and change the direction upon reaching the maximum or minimum value
        if (gMinHeight <= 5.0 || gMaxHeight >= 65.0)
        {
            gDirection *= -1;  // Reverse the direction
            gMinHeight += gStep * gDirection;  // Correct the min and max height
            gMaxHeight += gStep * gDirection;
        }
 
        // Set the timer for the next interval
        llSetTimerEvent(gTimerInterval);
    }
}