Actuality we can generate png where color represent biome.
And he can do the reverse? Total control !

And also, you will a version for Spout?

Good idea .. and i have some code for this, only one question .. what to do wen generation will out image size ?

Hmm spout, you mean Spout server ?

It is the responsibility of the admin no ?
Else reproduce the image inverted, symmetry keeps the consistency of biomes ? in mosaic? or simply flat biome or default biome.

Yes, Spout server, I do not know all the details, but I think the generation functions of the Spout API are ok.

Or simply not generating chunks, exceeding the limit of the image by a player will not generate chunks and will save disk space.

2 options, specified a biome for zone out image size (flat, null or other), or mosaic.

A date? I hope a lot about this feature

This weekends or bit later.

Any update on your progress? I would like to see this, too. I hope this gets ready to use this week.

For the zone that is out of the image I would recommend to fallback to Terrain Control's standard algorithm. Then we can make a world with custom biomes, export it to an image, edit the image to "finetune" spawnarea or put oceans in it and at the end of the image the transition would look seamless as the base terrain is made with the same algorithm.

I am working on it now.

Done.