ZBrushCentral

newbie - need advice on a workflow to make a low poly rock from high poly geo

*I’m using 4R4

So I have a medium/high poly rock that I scanned using photogrammetry. It has ok mesh but slightly messy. Same with UVs, but they do the job.

I basically want to be able to clean up the model while lot losing the UVs.

Also would be nice to lower the polys and project the detail using maps if poss.

A step-by-step would be helpful as I’m a little lost when it comes to Zbrush.

https://vimeo.com/83681474

Thanks for the link. Spent all of today on it with very awful results.

I don’t suppose you know this workflow at all? I honestly thing that for me to get the same result as this dude, It would be like an infinite amount of chimps, given an infinite amount of time, might write the complete works of Shakespeare.

It would take me a month of doing it every which way possible until I accidentally got it right. But if someone could just answer my specific questions one at a time, it could be done in minutes.

for example, I imported my model back to Photoscan (for a start, it came in very far from the origin point of origin even though I hadn’t changed this in zbrush), built texture and the texture the texture was a mess. So I started the whole process from scratch, following more closely, this time, the texture was a solid black mass. So I did it a third time and no texture was added whatsoever.

That tutorial was done by a professional from a scan company http://ir-ltd.net/

I know the workflow as I have done it numerous times. It needs previous good knowledge of Zbrush. There are not shortcuts and you need to know numerous tools. Zbrush is already quite complex but it is even more when interacting with other programs.

This is another very good tutorial:
http://www.jeffreyianwilson.com/free-tutorials/

The forum of photoscan is probably better than this one for that type of workflow. They also use Zbrush as it is the industry standard.

http://www.agisoft.com/forum/

Thanks, I’ll take a look at that one also.

For now, I have a specific issue that I’d appreciate some feedback on. I was initially going off this video:

[video]https://youtu.be/PMkWDDmO5A8?t=12m27s[/video]

(I’ve linked straight to this particular issue)

I have my original base mesh (rock scan with UVs, slightly messy geometry) then I have my cleaned up mess which has had detail projected onto it. It has 3 subdiv levels and it’s own UVs done in Zbrush.

I spent a good while trying to project the texture from the base mesh, which wasn’t working until I did something shrug and it finally sent the texture info via polypaint > ‘project all’ to the newer mesh. But… what came with is was a few ugly pieces of geometry. I didn’t have Zadd clicked or anything. Just a few snaggly sharp pieces here and there, almost like little holes and little spikes.

Update: I think I know what’s happening. I’m trying to exclusively project the texture, but geometry is coming with it. Because the original object is different to the new object that has cleaned up mesh, anywhere there’s a discrepancy it’s filling with projected geometry.

So how do I make it NOT project the geometry and focus on the texture?