Cube maps are created under Adobe Photoshop as shown below by arranging images for each view direction in a horizontal cross pattern without gaps between images.
+Y | |||
-X | -Z | +X | +Z |
-Y |
(The blank parts in each of the four corners are not used.)
Images for each view direction must be equally sized squares with dimensions that are a power of two equal to or greater than 8 and equal to or less than 1024.
The coordinate axes of each view direction image under Photoshop are defined as follows.
View Direction | Up | Right |
---|---|---|
+X | +Y | +Z |
-X | +Y | -Z |
+Y | +Z | +X |
-Y | -Z | +X |
+Z | +Y | -X |
-Z | +Y | +X |
Under CTR the -Y direction is upward, so 180-degree rotated data is output as additional information in TGA and CTEX files for images representing the +X, -X, +Z, and -Z directions.
For images arranged in a horizontal cross, execute the mipmap creation plug-in to create a mipmap image for the cube map.
CONFIDENTIAL