no there's no way to bend a parallelepiped in bryce but u can use some tricks, for example yus can make the board with a 2 cylinders (one positive and one negative) with a very low curvature and some negatives cubes.. it's a bit difficult to explain with words....see the image is better. Regarding poser people... no you don't need to have poser installed but you need someone who export poser people for you. hope the image is clear