Custom tilesets

I think that it could be good to make some tilesets for people, who can't do it very well.

I'll start with empty tileset (mask is not included...)

sounds good, ill make one just now!

Just a question, will there be a saira section in the knyttlevels archive? 

Just a question, will there be a saira section in the knyttlevels archive? 

How can I know it?

I made a progress on tileset for my level but when I made changes on tileset mask in Gimp, I got really bad sursprise... The game doesn't work... Saira can't move...
I have only one copy...

Please, can somebody help me? I can't fix it.

Yes, every one can use or edit this tileset...

EDIT:FIXED
Scroll down

http://nifflas.lpchip.nl/index.php?topic=2415.msg27391#msg27391
that your problem

(me thinks)

http://nifflas.lpchip.nl/index.php?topic=2415.msg27391#msg27391
that your problem

(me thinks)

I don't have Photoshop and I can't do it in the Gimp. Is it possible in it? I hope...

right click on the layer then press remove alpha channel

right click on the layer then press remove alpha channel

Thanks

right click on the layer then press remove alpha channel

Thanks

Here is the tileset with the mask. Everyone can use or edit it... (recoloring, etc...)
It is not final version, I will add some things like more vertical walls.