With Bryce or Vue you're missing a scenery builder. You can do that with Carrara but I hear the others make it much easier. And I've yet to see anything that can match Vue's plants. With Poser you're missing a body motion / model posing program. In any other app what poser does would be likely extremely difficult and time intensive. I don't render with Poser sure. But my work almost always seems to start there if it involves anything from the 'animal kingdom'. side of life. Pose it, then export it over to Carrara. Texture, light, and render.

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