This Kaleider screen shot displays a photo after the L/R Inner Trapezoid pre-defined Triangle Mirror Pattern has been selected.  The Mirrors have been created within a right triangle shaped 'Mirror Box' that has been adjusted to the desired size, and positioned on the screen with the mouse.  (Exact position and size values can also be set via the Effect Controls panel at the top of the screen.)  The Mirror surfaces (in this case 3 of them) are outlined, with the red lines representing the 'plane of reflection' for each Mirror.  The Kaleid Tools panel along the right edge of the screen contains buttons for most of the common options and Kaleider effects.  Edit Tools along the bottom of the screen provide controls for manipulating images and Tiles.  Both of these can be toggled on/off via keyboard commands.  A Popup Menu is also available to access all Kaleider commands.  Just press Render (or the Space Bar) to render an effect.  The Shifting Effects feature can then be used to reposition the result as desired with the mouse, essentially re-rendering the same effect based on different relative positions within the source image.
Kaleider Screen - Mirrors Created
(In this example, the Tile Source Image option has been set in the View Menu, so since the source image is smaller than the screen size, it is mirrored across its edges to fill the screen.)  The Appearance Options function can be used to set preferences for the interface.  This sample screen shows the Kaleider Original Interface Style, with colors on a dark background (the button colors are somewhat dulled because the image was saved in the JPG format).  Click here to see what the same screen looks like with the Standard Windows Interface Style.  The interface elements can also be scaled to a larger size, perhaps making it easier to read text and buttons on large, high-resolution monitors.