Images whose file names end in "vert" are intended for demonstration on vertical surfaces: screen / wall, monitor, TV, interactive whiteboard, etc. Attention! When demonstrating a key image by a monitor (TV, projector), in some cases, the 3D model image may be unstable due to the proximity of the monitor's scan frequency and the camera frame rate (often doubled).
      Images whose file names end with "horiz" can be printed and displayed on horizontal surfaces: table, floor, etc. You can print in both color and b/w - the quality of recognition does not depend on it.