X-Map – By hand

X-Maps enable you to cut out portions of your outputs and warp them independently.
By using X-Maps we will be able to warp all 3 sides of the cube independently.

In the Shape subtab, open the Configuration window and set the Curve type back to Keystone and select the Reset option to reset the grid flat.

In the Settings subtab, toggle the X-Map button ON.

In the X-Map section on the left, add 3 X-Maps, 1 per cube face, and rename them accordingly. The size can be left to default.

In the Shape subtab, switch to MAP mode by clicking on the button button.

The button should display as to indicate you are in MAP mode.

Click on the button to capture what is currently being displayed in the playlists and have it as a background in the MAP mode.

The pattern should appear in your Warp area.

Now bring the four control points to fit as close as possible to the cube face.

You can zoom into the interface for more precision.
By clicking on the you can toggle the display of the control points to crosses by using the button to see their positions more accurately.

Repeat these steps for the other two X-Maps on the other two faces of the cube.

Now toggle back into warp mode by clicking on the button again.

Moving the control points now warps each X-Maps independently.

Note that order matters in the X-Maps list on the left.
The bottom most X-Map in the list is displayed on top, above the others, and the top most X-Map in the list is displayed under all the others.
Also note that although the following video does not mention this, it is recommended to configure your X-Maps in Keystone mode instead of Curve mode.
This way the pixels will spread more linearly when the X-Map is warped.

*Tip: You can toggle the Solo mode ( → ) when warping an X-Map to avoid seeing the other X-Maps in your projection.
You can also combine solo modes to display only the X-Maps you wish to see.

Repeat these steps for the other two sides of the cube.

Note that the result is far better and warping process a lot easier than with the previous method of simply warping the entire output.