Vray too slow while rendering

[panixia]

@karismah said:

Maybe you have nice method for great looking and not heavy curtains?

i'm not god. i'm quite new to sketcup and vray and i'm sure a lot of people here could advice you better than me. also i'm not that good at english, so it's difficult for me to explain sometimes..
anyway i will try..

i can't see it well from your screenshots, but your curtain looks very high poly. do you downloaded it from some 3dsMAX collection or something like this? or did you modeled by your own? i find IMHO that modeling object by myself to fit my render's needs is the best solution when it is possible..

in this case you say that you are using a double side curtain with no refraction on it.. why double side if you don't need refraction? also you are using a very small output like 800 pixel wide? so you can barely see the tickness or you can't see it at all.. for the same reason i suggest to model a section as a component (i would suggest to use beziere splines + extrude edges by rails, so you can easily control your segments) then copy-repeat the component.

all in all, i think a single sided low-poly component repeated (flipped and scaled maybe) would dramatically cut down the polycount and of course the render time..

ps. what's your computer specs?

[andybot]

@karismah said:

Hi,
I don't have refraction on curtain, I use double sided material by V-ray with translucency on bacic material and 2sided material. On few others I have bump effect but not displacement.

can you post a screenshot of your curtain material settings?

[karismah]

Hi, I am sorry I haven't replay for soooo long. I had no access to internet for few days. I did exactly you have told me. I reduced size of elements I delete curtain which was extremly heavy and I modeled it in Photoshop So there is an effect of my work.

Thanks for help
Karo

[Ridie1389]

I think it's because you're trying to put too much strain for too long a period on your poor notebook.

You have a massively detailed scene rendering at a 4K resolution running on a laptop with a pretty run of the mill graphics chipset and a slightly above average cpu.

I have a desktop running a Nvidia GTX 660ti and an AMD A10 APU along with a hack file for allowing VRAY to utilize 4GB of RAM. And I would never even think of doing that.

Also, what I've realized is that with rendering, at least with VRAY for SketchUp, is that doing either more than five or six renders and/or an extremely demanding rendering considerably lowers the graphics performance of the GPU, but for me, it only lasts until the next reboot. Hardware gets "exhausted" too, even without using demanding programs of any kind on most systems, it's smart to shut down your system for around 15-30 mintues every couple days, or far more frequently if you're putting that kind of strain on a notebook not optimized for such things like say the Alienware M18X or the MSI GT70.

Keeping that in mind, you also really need to bump down the resolution. I have a nearly top of the line graphics card and I never run mine over 2048x1536. High-poly models also take a huge toll on performance. Honestly, I don't recommend using a high-poly anything unless it's absolutely necessary, for say a severe close-up. As long as its not a really low poly, most times in an internal scene it's difficult to notice really any difference in quality between high-poly and medium-poly.

One last tip. It's typically better to have more realistic renderings rather than really high resolutions. Here's a link that you'll hopefully find helpful.

By Steven Man V-Ray for SketchUp is a rendering plug-in that can require a lot of time to learn properly.  To fully understand V-Ray would be ve

(www.sketchupartists.org)

[ridation]

Hi everybody , I have a problem with starting rendering ...

When I click the Render button it takes several seconds to start rendering and system tray shows me "not responding" for sketchup , but it starts rendering after (let's say) 15 secs . There is also a message says : " V-ray is currently processing your scene , please wait..." . But it is not normal , no matter what scene I want to render I have this delay , even on an empty screen !! I think it might be a V-ray software problem cause when I installed v-ray it causes a big delay to SK launching . and the problem solved after uninstalling v-ray .

Any idea ?

[valerostudio]

No one should be waiting 5 days for a rendering unless they are rendering on a 486 (some of you youngins might not even know what this is).

My first go to is, displacement - unless you absolutely need it, I would not use any. If you are downloading vismats from the web you might have displacement on a material and not even know it. Also, you might have high subdivs on a material and not know it.

There a hundred factors in VRay that can increase render times, so I don't think any of us could tell you exactly what it is, but I can tell you that if you are using the default render settings and test a render at 800 wide and its taking a long time, you have displacement somewhere most likely. One way to try to turn it off is try through the global displacement setting and set the amount to 0. If the render starts quickly, now you know. If not, then try setting the global subdivs multiplier to .25 and see how this works. If still very slow, then you might have a texture map in there that was downloaded from the web that can cause issues. I tend to stay away from stuff downloaded from 3D Warehouse as much of it is crap and has texture maps with funky file names and characters.

[dkendig]

if you can zip up the model, as well as any external files that are referenced (textures, cached map solutions, etc), and upload it to a place like google drive, soshare, or mediafire, someone might be able to track down the issue faster than just looking at screen shots.

[ridation]

@ridation said:

Hi everybody , I have a problem with starting rendering ...

When I click the Render button it takes several seconds to start rendering and system tray shows me "not responding" for sketchup , but it starts rendering after (let's say) 15 secs . There is also a message says : " V-ray is currently processing your scene , please wait..." . But it is not normal , no matter what scene I want to render I have this delay , even on an empty screen !! I think it might be a V-ray software problem cause when I installed v-ray it causes a big delay to SK launching . and the problem solved after uninstalling v-ray .

Any idea ?

up

[ridation]

No one can help ? please ?
thanks

[dkendig]

@unknownuser said:

When I click the Render button it takes several seconds to start rendering and system tray shows me "not responding" for sketchup , but it starts rendering after (let's say) 15 secs . There is also a message says : " V-ray is currently processing your scene , please wait... " .

That is normal. V-Ray has to grab all of the information in the sketchup file, and convert it into something that can be rendered. All rendering engines require some time to process the scene prior to rendering. In our 1.6 beta, we have added some additional features and optimizations that cut down on the delay significantly.

@unknownuser said:

when I installed v-ray it causes a big delay to SK launching
Yes, our plugin loads when you launch SketchUp, and it takes a bit of time to load dependencies and get our plugin up and running. You can disable our plugin in the Window->Preferences window. Click on Extensions and then uncheck V-Ray for SketchUp. Note, unloading our plugin requires you to restart SketchUp.

[ridation]

Thank you Devin ,

I understand that , but I think this is a different issue , cause I see "Not responding" message . In a normal start you do not see "not responding" message . Or I am wrong ?
I even have the delay when I try to render an Empty scene !!

By the way , I use Win7 / 32bit / 4GB ram / Intel core2(tm) quad 2.83 GHZ CPU / Sketchup 8 / V-ray Version 1.49.01

Kind regards .

[valerostudio]

I'm going to be a little crass on this one. It is Monday afterall.

1. Get 1.6 (LEGAL COPY)

2. Get a computer with an i7 processor (i5 at a minimum). Desktops are insanely cheap now. You really need a decent multithreaded processor and RAM if you plan on rendering with ANY render engine.

3. Stay away from 3D CrapHouse models. Whenever I have had an issue when a render just stops working and is stuck, it's because I have some random texture or something wonky that came along with a 3D Warehouse file. One time I had a model with Asian characters in the texture name and this made VR grind to halt.

Do this as a test. Go to the Options panel - reset to defaults - then go to Globals and try a test render with Override Material on. If that renders quickly, then you know its a material killing your render times. I would try a purge all, then run down you list of materials. Look for weird characters in the names and in the texture tiles. Then I would crawl through the VRay material settings and look for any materials that might have high subdivs or metals that use Ward or Anisotropy. I find that this has also made my render times hit rock bottom.

[dkendig]

The "not responding" message means that SketchUp is busy, and unable to respond to any input what so ever. That's because we are using every possible bit of processing power and memory that is allocated to SketchUp, in order to process the scene and render as quickly as possible.

[panixia]

@valerostudio said:

3. Stay away from 3D CrapHouse models.