Terrain Control does not create a world precisely from an image file. Instead, it inflates the image to several times its original size and then generates the world. This isn't just unsound and illogical, it's also problematic.

I want to manipulate a generated world and then use that world with 'FromImage' generation. I cannot do this, because the generated .png file is expanded when it is used in 'FromImage' mode. If I make my world, generate the .png, add what I want, and use the new .png file for my world... it's 10 times bigger than it's supposed to be. I cannot shrink the image, it will cause blurring. I understand that an image can be expanded to multiples of its original size without problems, but it cannot be contracted without causing blur.

If my problem seems like it's the only one, consider this: I can't use "/tc map" to export my map and save it for future use, or to duplicate for other worlds, or to give to a friend for his world. It seems like I should be able to do this, but I can't unless the image is the same size when used.

Please adjust the plugin to maintain the image size when using FromImage generation, so that we can use generated (via "/tc map") biomes in our map.png files.

Yes please either change the default or make an option to allow 1 pixel = 1 block FromImage generation.

Yes i know it is illogical.
But there is architecture problem. Terrain generation use two images - normal and zoom out.
Normal used for final stages, zoom out in first stage for performance.
So i have only zoom in algorithm and cant use normal image :(
If some one may write zoom out algorithm compatible with current zoom in - i add this.