"just got Blender which is a free 3d modeling program, and pretty good with good documentation. Poser has the tools within it to be a kinda simple modeling tool if you don't get too complicated." Blender is great, but if the models are original, you do need to UV map them. There are a ton of great meshes out there for free, columns for example to build that temple to your own custom specs. If atmosphere is worth it too you, build your own stuff, and architectural interiors are some of the easiest things to model.