Hi Dan, The improvement is that with v.4, you'll be importing directly from the PZ3. So you won't need to export a separate model from Poser (plus additional models, clothes, props, etc). You won't need to remember where all the textures are located, won't need to change BUM to BMP, won't need to twiddle with the Y-1 for the texture or play invert with the transparencies. From what I've heard, you just select Object Import and point it to the PZ3 and everything just comes on in. Your program features (which Mike has told us so much about) will still be very handy for persons staying with v.3. :)