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Need Help with Geometry HD in ZBrush 3.5R3 Please

ZBrush Usage Questions
#1

Hi,

I have been searching ALL DAY trying to figure my problem out and you guys are my last hope! :slight_smile:

This is my first forum post ever so please excuse me if I didn’t post this in the right area? I have searched the forums about this but there seems to be very little on the HD subject at the moment.

I am trying Geometry HD sculpting for the 1st time and I have run into a snag!

  1. I am in the process of modeling a game environment and I have been modeling all my low rez geo in maya and importing into Zbrush to create high rez/normal maps from. ect…

  2. I subdivided my mesh using the normal sub d process to about 1 million polys I then pressed Geometry HD subdivsions 3 times to give me a total of about 63 million polys to work with at the moment in HD.

  3. I imported a new (identically shaped with a couple more polys) piece of geo into zbrush that I need to replace the previous piece with and need to PROJECT ALL my levels of sculpting detail onto including my Geometry HD levels so I can countinue sculpting from where I left off. (Cloning the tool doesnt work for this situation and importing it into a lower subdivsion lvl won’t work because they arent exactly the same vertices wise).

  4. So I Have my orginal mesh with all its Geometry HD (64 million) detail as a subtool then I appended the other piece of geo as subtool with the same amount of Geometry HD subdivsions (64 million) but without any sculpting details. I select the subtool I want to project onto and hit PROJECT ALL zbrush does it thing and bam transfers all of the basic sub d lvls and the details from those lvls but not the Geometry HD lvls and there details???

  5. Am I missing a step somewhere?? I have even used the Sculpt HD button in the Geo Hd dropdown to show all the HD details in full rez that I need projected and then proceed to PROJECT ALL but that gives me the exact same results as the previous step!!!??

Sorry for the long post… I am trying to be a precise as possiable about the situation!

I would love any help I can get on this, I am really stumped!

Thanks So Much! :slight_smile:

#2

I have not tried this but I do believe that it will work.

  1. Go into your old model with HD sculpt. Go int the HD mode.

  2. Clone your model.

  3. Go to your new model (with the added geo, that you projected all of your base sub d information to.)

  4. add HD sub D’s.

  5. Append your HD clone from your first model to your new model.

  6. Now go into the HD mode on the sculpt from step 3. (Should be the same location that you cloned from in step 1 -2)

  7. Store a morph target on your model from step 3.

  8. Make sure that your model from step 3 is selected in the subtool palette, make sure your cloned model is visible from step 5, now do your “project all” button in the sub tool.

  9. Use the morph brush to brush out any bad projection areas.

If this works for a section then you will have to repeat this process how ever many times you need to get your model back to the condition that you started before you added the new geometry.

Now looking at all the work that needs to be done, you might want to ask yourself if the new geo change is worth the conversion time.

Hope this helps! :slight_smile:

#3

Nickz:Thanks for getting back to me on this one! I appreciate it!:slight_smile:

Unfortunately, I have been down this road and I am happy to hear that I was right on track! I had started to do these steps previously and had said to myself that there has to be an easier way then this!? Didn’t seem right doing it that way, thought I was missing something? But, I guess not. :wink: I know that sculpting HD technology is still being worked out within ZBrush and so far I am loving it!

Unless, someone else knows something that we do not on this topic, I guess I will just have to start from the highest basic sud d lvl from doing a standard PROJECT ALL since it will at least get me close. I will then have to add my HD lvls back manually without the previuos details and re-sculpt the HD details back in. :confused:

Hopefully in the ZB4 release they will check out that functionality? You would think it would be there?

Please if anyone else knows how to PROJECT ALL HD DETAILS AND LVLS from one piece of geometry onto new piece of geometry in ONE step without having to do it a patch at a time please let us know. :slight_smile:

Thanks Again!

#4

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I want to only sculpt on front… how to… switch off the back side so, that i can work on more space on fromt…