The free version of IDX Renditoner Express includes all the same features as IDX Renditioner but differs in render size and possibly speed.
IDX Renditioner Express (Free) supports a maximum render size of 640 x 480 pixels.
IDX Renditioner Express (Free) includes a smaller number of light components, but more will be available on the forums at http://forums.idx-design.com. Lights are easy to create and we encourage you to share.
At this time the PC version is available, but a free Mac version is expected soon.