On my old computer I wasn't able to render real scenes in Vue, too. I have used Carrara with very fast renderer (but they used some tricks (they used some type of global ambience as as global illumination or radiosity) and in some cases result was very poor. As background I have used mainly photos, from photos I have done .hdri image for backdrop and all process was very fast (in era of cooperation with Contantin Udalov we produced one picture per day. Vue has its (EXCELLENT) clouds generator and outdoor rendering could be more realistic (reflection of real clouds and terrain, etc.) but payment is speed. Last versions are faster but this is really not software for smaller comp. But as usually they are other subject problem - for example I prefer very detailed textures with rivets, etc. Size of one rivet is 3x3 pixels and when you want apply texture on all model its size must be thousands of pixels (6-10 000 pixels). But when I render model in smaller picture (for example 800 pixel width) every applied texture point is computed ~ from 10x10 = 100 pixels from original texture. And certainly this antialiasing is not so perfect as in Photoshop. You lost details and mainly power. Vue supports mipmaps (more copies of original texture in different size applied in different cases) but I didn't test it. For animation I use smaller textures, without bump map, etc. So, Vue has a lot of pluses (newest version 11 will have finally particles, too) and you have to accept it as is. I have done one test when I rendered huge model (M-50) over clouds. Rendering time of M-50 was only 20% from total rendering time of cloud layer. Clouds it is for me main bonus of Vue