Hi Carlos,

I am still working on that problem but it is allmost solved. Hopefully I will solve it without further problems.
On the edges (row and column) it still working fine but I have to write the code for the points where 4 tiles have to be moved.
Unfortunatly I have a problem with my teeth. It is a inflammation under one tooth and it has to be removed. So will finish the code soon but first I have to go to the dentist and also work on my job.
I will tell you if my code is finished and working well.

See you soon on the forum und thank you for your help

best wishes, Bert

PS: It is very cool that you give me so much support!!!! I will post my project soon when I started to include invinite terrain with terrain-tiles, multiplayer and partial load of terrain-tiles (8 views) to save memory. I started to modify the include-file "terraindeform.c" with many new features. Hopefully the foru will like it!