Blending Pictures

Once you have a picture in each of the first two squares, you blend them to create a third image that is used to create the new Terrain Canvas.

To blend pictures:

Load pictures into the first two squares. If you load only one picture a white square is used as the second blend image.
Click the triangle icon under the third picture box and choose a Blend mode from the menu:

Blend: compares each corresponding pixel from the first two squares, and displays an average of the two in the corresponding location of the third square.
Minimum: compares each corresponding pixel from the first two squares, and displays the darker of the two in the corresponding location of the third square.
Subtract: compares each corresponding pixel from the first two squares, subtracts the brightness value of one from the brightness value of the other, and displays the result in the corresponding location of the third square.
Add: compares each corresponding pixel from the first two squares, adds the brightness value of one to the brightness value of the other, and displays the result in the corresponding location of the third square.

Drag the pointer over the Blend control. Click and drag to the left to use more of the first image in the blend. Click and drag to the right to use more of the second image.