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merge subtool wont reconstruct lower?

ZBrush Usage Questions
#1

im trying to project a normal map from 3 subtools onto one object. when the 3 subtools are merged though, they are more that 500,000 polys so zmapper wont import it.

now i used reconstruct lower subdivs on the merged tool ONCE and it had work…BUT now it wont work again!

is there some small step i forgot, that i did last time?

anyone else have a solution or workflow for doing something like this?

thanks

#2

ok after messing with it for a long time i figured it out and found a possible bug or limitation.

i was using a shoe as my merged tool, (shoe, laces and sole)

the laces were extruded shapes from maya, but all had open ends. zbrush could reconstruct one lace at a time, but when they were all combined (about 10 pieces) zbrush couldnt figure it out. so i closed all the holes in maya and no more problem!