OsSetTerrainTexture

// 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);
    }
}

// Random Terrain Texture
 
integer gTimerInterval = 300;  // 300 seconds (5 minutes)
 
changeTextures()
{
    // Get the number of terrain textures in the prim inventory
    integer numTextures = llGetInventoryNumber(INVENTORY_TEXTURE);
 
    // If there is at least one terrain texture
    if (numTextures > 0)
    {
        // Loop through each corner
        integer i;
        for (i = 0; i < 4; ++i)
        {
            // Select a random terrain texture from the inventory
            string randomTextureName = llGetInventoryName(INVENTORY_TEXTURE, llFloor(llFrand(numTextures)));
 
            // Get the UUID
            key randomTextureUUID = llGetInventoryKey(randomTextureName);
 
            // Set the selected terrain texture for the current corner
            osSetTerrainTexture(i, randomTextureUUID);
 
            // Display the selected random texture UUID in chat
            llOwnerSay("Selected random terrain texture" + (string)i + ": " + randomTextureName + " - " + randomTextureUUID);
        }
    }
    else
    {
        llOwnerSay("No terrain textures found in the prim inventory.");
    }
}
 
default
{
    state_entry()
    {
        // Start the timer to change textures every xxx seconds
        llSetTimerEvent(gTimerInterval);
        // Initial texture change
        changeTextures();
    }
 
    timer()
    {
        // Change textures when the timer fires
        changeTextures();
    }
}