ZBrushCentral

Crash on Render (answered)

ZBrush Usage Questions
#1

I need to max out my canvas size to get a large, high resolution picture that I can export to Photoshop. The final print size needs to be roughly 16x14" @ 300 res. for pixel-free offset printing.

I have an image with about 10 subtools, and they need to be rendered out seperately so that I can make adjustments to each layer in Photoshop. I’m essentially rendering-out each subtool and exporting as PSD for post-work.

Sooo, I size my canvas to the max, load my tool (with subtools), turn off all layers except the one I need to export, render at BEST…and Crash!!

As a result, I need to start all over for the tenth time today. I am so tired of crashing on render…this is always a problem for me.

#2

What are your PC setting and your Preference Compact MEM settings?
and probably you may want to load each cloned subtool isolated and render…clear the canvas load the another one from a folder and so on…try it!

#3

Preferences are at default settings.

Problem with bringing them in seperately is that I need to position the subtoolsl identically every time I bring it in somehow. So each subtool would need to be in the exact same positon each time I upload it, so they all match-up later.

#4

As a test, I deleted all of the subtools except for one and rendered it, and it crashed anyway.

#5

What is the document size? For 16" x 14" at 300 dpi you should only need to set it to 4800 x 4200 pixels. If you are doubling so as to use AAHalf then you are going unnecessarily large for a picture that is going to be printed. The anti-aliasing will occur automatically when the image is reduced. AAHalf is intended for images that are going to be viewed at the same size on the web.

Also check that a particular material is not causing the crash. This has happened in the past (with ‘glow’ materials for example).

#6

I’ve just noticed that you say crashing on render is ‘always a problem’. What version of ZBrush are you using?

If it is ZBrush 3.2 MacOSX, then try setting the Light>Shadows>Uni slider to 100.

#7

Always a problem with large detailed, multi-subtool models on large canvases.

I’ll get back soon on other question marcus…

#8

Exact numbers to work with.

I need my final Photoshop document to be 5100x3510 pixels, which is 11.7x17" @ 300 res.

In Zbrush, how big should my canvas size be so when I export the rendered art to Photoshop, it will be antialiased @ the above size specs?

I assumed I had to double the Photoshop final canvas size which is 5100x3510 pixels (…so max out my Zbrush canvas size to get close) and render w/ AA Half activated. Then export to Photoshop to get a 300 res (unjaggy) Photoshop image.

Am I screwed up in my thinking??

#9

As I said, you do not need to use the AAHalf button. That is for images which are going to be viewed at screen resolution (72 dpi). Using AAHalf for a print image is overkill.

You didn’t answer my question about which ZBrush version you are using…

#10

Sorry, I’m at work right now.

ZB-4

#11

What I meant was…I’ve been at work this whole time, but forgot to answer which version of zbrush I’m using because I’m otherwise occupied…but I’m sill here ; )

#12

That’s OK, that’s what I thought you meant. :slight_smile:

The only thing I have to add is that if you are using ZBrush 4 then the BPR (Best Preview Render) has its own anti-aliasing set through the Render>SPix slider (zero is no anti-aliasing). So if you are using BPR, the AAHalf button is redundant even for images that will be viewed at screen resolution.