The main reason is because with OpenGL you get a faster preview, meaning that complex scenes will (should) be live updated without going to wireframe or so. There is also the option of dualplanes which means that only the elements that have changed are updated whilst pixels that haven't aren't touched. This speeds up even more. Yet, unfortunately, only the real pro cards support it fully. Others, the better "gamer's cards" also support it, but to a limited extent which means that there usually are some issues, annoyances. Yes, the companies say: full support, but when you use the drivers of a FireGL on a 9800Pro, you'll notice the difference. Word goes that you can easily change your Radeon into a FireGL, but I didn't try, and take no responability for those who do so. My opinion is that people always want tings that are implemented in the pro-apps, whilst Poser needs desperately a lot of other things that I consider more important than OpenGL. Like an object manager for example, multiple undo and a polygon room where you would be able to work with points, edges and polys (magnets are only a first step). Now that P has split in a "fun" version and a "pro" app, the pro app must be freed from metacreations/KaiKrause restants like the outdated interface, the content room and the face room should be made to include the Daz Millenium unimesh people. So OpenGL? As it does not influence render times, but only makes the live-update quicker: for me, not directly. First build a good foundation for your mansion before you start thinking about the furniture. my 2 Eurocents

I have tried prudent planning long enough. From now I'll be mad. (Rumi)