I am sculpting a figure for use as a low res character in a game. I started with a low res mesh (done in Carrara), loaded this into ZB4 and increased the divisions a few times to do a rough sketch of the character which I saved and also produced a normal map of the difference between my sculpt and the base mesh - so far so good (although I would class my self as a newbie when it comes to ZB).
Today I loaded the ZTool that I saved at the stage the I had got to previously, increased the divisions one more time and refined the look of my character. However when I came to outputting a normal map, I realised that now the lowest level of divisions was the previous highest level, and the UV map had been lost. There was therefore no way to output a normal map from this that I could apply to my low-poly original mesh.
Has anyone else had a similar issue, and is there a way to match the first model / Ztool (which still has all the sub-levels when I load it) to the newer model which has lost its previous sublevels? Help!