Sorry for the late time reply...
Ha yes thank... I know what you says, because the layer switch at the middle of the sprite, if I make more empty space by adding just one pixel at the bottom the midle of the sprite (so the layer) will be down too. I will try this...

Thank you for your reply...
I tried adding a patch (base_patch) to hide the entry of pipes unsuccessfully ... I keep the same size as the original picture.
Maybe I should reduce the size of my patch and ( shift ) it after. Or apply a ( render_layer ) or a ( final_render_layer ).

We should be able ...

Have you found a solution? I have a similar problem for a building. viewtopic.php?f=25&t=38974

Hi... I'm a beginner, my question is probably stupid :? ... I modified a sprite of a mod (factorissimo) and now when I connect a pipe down the factory, it passes over the roof.
http://i.imgur.com/iLUpi0d.png
I've been searching for a long time on the forum, but I'm not an English speaker, so I ...