Zbrush options help.

Athomield

Hey guys, i have 4GB of ram witch is not bad for supporting high-res geometry .
so, my probleme is when i go to Zbrush and i subdivide (a dynamesh sphere) it starts lagging at the limit of 11Mill polygon when today i had a file of another person who sculpted the character that is around 25Mill polygon but it doesn't lag at all, like there is nothing there.
Can you guys tell me is that some sort of luck or it's some rendering tricks ?

cryrid

If the tool is split into subtools, each subtool can reach your system's limit. So if you can only go to 8mill comfortably, you shouldn't have a problem having a model with 24mill if it is split into 4 subtools.

I wouldn't be surprised if other vertex-related data like UVs and Polygroups might also have an impact on the true size of a mesh.

Athomield

thanks
so, no rendering or mem settings ?

JohnnyRaptor

Also, the other scene may have a more optimized basemesh. In ZB, when you rotate, ZB will dynamically switch the subdivision as low as it needs to maintain a smooth framerate. If your lowest subdiv is 3mil, obviously that is going to be a lot laggier than a 25mil subdivided mesh with a basemesh that is 30k etc.

electricsauce

Zbrush is only 32 bit so it can't use more than 4 gigs anyways, but if you are running background apps it wouldn't hurt to have a little extra ram. The only thing you can change with the memory settings as far i know, is the maximum mesh size. But if you alter this, you can and will crash zbrush.

The best thing you can do to keep zbrush running smooth is not get to crazy with the polycount and keep as many different subtools as reasonable possible.

Athomield

electricsauce wrote: »

Zbrush is only 32 bit so it can't use more than 4 gigs anyways, but if you are running background apps it wouldn't hurt to have a little extra ram. The only thing you can change with the memory settings as far i know, is the maximum mesh size. But if you alter this, you can and will crash zbrush.

The best thing you can do to keep zbrush running smooth is not get to crazy with the polycount and keep as many different subtools as reasonable possible.

Well i agree with the apps background and not going for a crazy amount of polys and i also agree with you that ZBRUSH is 32bits but it can use infinty amount of ram inspite it is 32bits

cryrid

You can play when the memory settings to see if you can squeeze some extra juice out of your machine, but those settings are not generally saved and loaded with normal models (I don't even think they're included with projects), so its not something one file would have altered that another file wouldn't have.

Material/render settings would probably make the biggest impact when using Best Render or BPR, unless your dynamesh file has some multi-materialed, lightcapped thing going on.

And 4 is a long ways away from infinity :P
https://support.pixologic.com/index.php?/Knowledgebase/Article/View/66/0/is-zbrush-4r2-64-bit

Athomield

thanks.