In art the tool is the means for the artist to express him/herself. Whether that tool is a camera, a brush or a computer. As long as people don't brag about things they have not done (pretending a scanned face is an actual render or that a rendered face is a retouched picture) the tools you use are only for you to decide. Poser is a great program with great limitations: anytime you bend a limb more than 90 degrees a retouching job is required to erase the "scratchs".