Making Autotiles that blend like 024-Ocean01 & 025-Ocean02. How?

[beekeep]

Move me to resources if this is the wrong forum, but before you do..I need help with how to actual draw this type of autotile not for someone to draw one for me.

I have been unable to find a similar question on here. (I was surprised by that, someone else must have asked before, unless it's really obvious)

I have just mastered basic autotiles and now I want to be able to create autotiles that act like the ocean autotiles that come with RMXP. If Ocean01 is drawn next to Ocean02, the seemless centre part of Ocean01 (or adjoining side bits) remains so that it can link with Ocean02. Unlike normal autotiles, which would revert to their edge graphic when placed next to each other.
How do I get my own autotiles to act in this way. I have tried copying the top left square of my Autotile01 to the second square of Autotile02, but it does not seem to work.

If it's really obvious and I have missed what to do then, please point me in the right direction. If I get chance I will post a picture.

Thanks in advance.

 

[Yeyinde]

See the top centre tile of the autotile file?  That is called the "parent" tile.  Just stick the top left part of an autotile image there and they will become seamless.

 

[beekeep]

Thanks for the reply, I have done that as described in my original post(not described very well though ), but it didn't work, do you know what the conditions are for RMXP to identify the which autotile the parent belongs to?

>>>>Edit<<<<
I have got it working. Not sure why put it seems to work if the parent tile has no transparency.