Forum: Carrara


Subject: Strange artifacts in a Carrara render

Spacer_01 opened this issue on Feb 26, 2009 · 13 posts


Spacer_01 posted Thu, 26 February 2009 at 6:37 PM

GKDantas: Very strange, but theres a lot of objects that isnt in use. The final render we cant see almost all those buildingd. To dont get a lot of memory used, delete those that dont show and dont project shadows in the scene. Maybe this can help a lot.
Other questions that one that need to be done everytime: did you cleaned the unused objects and shaders???

The truck's front bumper shows the default Carrara ground plane & sky reflection if theres no street of buildings. infront. I think its Dull Steel procedural shader thats for the bumper, suppose I can change it to Lead...  

Additionally, I duplicated extra buildings of the same, so they're all using the same texture instance, vs where you'd normally see Wall, Wall1, Wall 2, etc

Even for V4's Darcy skin texture, I saved the torso, head, and limbs to my shaders, deleted the duplicates loaded under new names in the list and applied the single torso where relevant, and did the same for the face and limbs body parts. That Alone always is a major resource saver. When I have multiple V3's or V4's, I usually use the 1 skin set on the same generation of figures. In my Rendo Gallery, Sisters was done that exact say, 4 x v3 = 1xv3 skin texture loaded in the scene. Same with Dystopia city blocks I use.

And always, I constantly Remove Unused Objects and Shaders after running those optimizations.

Also, the Daz3d pickuptruck by Serrge - 50% of it is my own handmade procedural shaders for the body and wheels. Then theres Carrara's own Glass, chrome and Dull Steel used for the windshield, bumper and mirror + door handles. Also, Light through Transparency and Caustics are enabled as render options, as the truck's windshield is using the glass shader. Only the truck's and bike's windshields are using the glass shader.

The Ninja is 99% procedural shaders also, only some some stock leather texture used for the seat. the Black paint is my own experiment, bit of gloss and reflectivity. Might still need a bit of work.

Miss Nancy: Yes, raytracing was also checked in the render.

Sueposer: I havn't tried reducing the level of Undo's. Although I always close Carrara, empty the DazTmp and do a fresh reboot and processes trimming before loading up Carrara to make the render.

holyforest: Yes, I saved the render as an image, just incase its a GUI & graphics card / driver display glitch. The artifacts show up in the saved document which i'll attach right below: i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/Ninja1scenetest2840glitch.jpg

aquiavic: With all due respect, I realize 2gb is fairly low and I'm still using Xp Pro 32bit, and 2gb is the max my motherboard can use, hence any and all optimizations I perform are by neccessity. A new motherboard and a nice 8 - 16gb ram kit is something I can't afford yet,

"Windows uses at least 600mb-that doesn't leave much for Carrara."
Right and Wrong / yes and no.

By default Windows XP with Service Pack3 chews up around ~500 - 600mb of ram with all its eye candy enabled, and no optimizations and tweaking of any kind - and thats on a fresh boot.  Vista is even a worse culprit, I've seen chew up 700-900mb on a fresh boot before getting tweaked out and geared for efficient & minimal usage of resources.

Now, just so everyone's on the same page here, I've done a fresh boot, unloaded all excess programs from running, and taken a screenshot. In addition, I'm also providing a screenshot of my entire Services settings, showing you whats enabled, disabled, auto, manual, and currently running.

I kid you not, these optimizations only makes windows chew up ~260mb out of the entire 2gb. Thats effectively 1.74gb free for Carrara to use + windows swapfile. That includes unloading Kaspersky, my A/V and firewall, in which upon the boot process I unplug the network cable from the machine

Its the only way I can do some of the renders I've done sofar.

Checkout these heavy windows optimizations:
Task Manager: i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/OptimizedProcesses.jpg

Optimized Windows Services page1: i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/OptimizedServices1.jpg

Optimized Services page2: i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/OptimizedServices2.jpg

Additional info:

System Properties:
Advanced Tab -> Performance Options -> Visual Effects tab:

Advanced Tab -> Performance Options -> Advanced tab:

WIndows Startup items and System Tray: 
"Start Menu -> Run -> msconfig -> Startup tab"
Such culprits like Adobe Acrobat, Quicktime player, MS Office helpers, NeroCheck, etc are also trimmed out soon as those apps are installed and show up on next reboot. I find those particularly offensive, as those alone can suck down resources and performance being loaded and waiting for use. Just the bare essentials like

Suffice to say, I build and upgrade my own systems, keep them running optimally.  If I was even more frugal with the windows services, all network services would also be gone from startup, though its a pia to constantly trim that handful of services out and restore them later.

Only excess fat I could think of still existing on this machine would be the bitrock installer registry entries that have been accumulating over time. This machine was freshly assembled last fall.

I'm still curious why Carrara rendered those artifacts for 2 cpu buckets, and why now Carrara just exits to desktop now instead of giving that Memory Allocation Error. I never seem to get those any more...

For those thinking maybe its the HD's going to sleep from power management, but I set them to Always On for rendering. I've had some renders take 8hrs overnight to finish.

Thanks for everyone who chimed in sofar with questions or ideas to try. Hopefully what I'v e provided in this post will further help. Feel free to keep asking and suggesting things to try.