Did you assign V-RAM in Windows?

I also had some scenes which froze my laptop with 16GB (14 usable) and after assigning V-RAM scenes worked good. Try this. If not, your trees might be Laubwerk and you lack physical RAM.

I have this problem with large models and plenty of scattered objects, lots of textures and high definition settings. At some point, sketchup starts to flicker in the background, but V-ray keeps on rendering.

When I hit batch render and leave the computer awake for the night , sometimes it freezes and only 3 of 5 renderings make it.

Most of times , V-ray uses all my 16GBs of ram and portions of assigned Vram.

hello,

I knew of a software which made a transfer between v-ray sketchup and v-ray max properties, just that I miss its name at this point. It was a script for 3ds max which imported material properties such as glossiness factors and bumpiness slots...

Though it can't be FULLY compatible since 3ds max is a different modeling platform than sketchup and will never be completely compatible with, also v-ray for sketchup is totally different than 3ds max one.

And if you know your parameters you can apply them in v-ray for max too . I know you don't like working twice on something, but that's the best way sometimes.

LE - here it is :

http://sketchucation.com/forums/viewtopic.php?f=322&t=63625

@matucaa said:

hi, i'm starting to use sketchup vray 3.0 and i'm trying to use the cut tool to render it, but when i get it finish the image is not quite good. it has ghostly plains in the main section.
in the pregress windows apears this txt : Scene bounding box is too large, possible raycast errors.

some one knows how to fix it?. attached images in this post!

good find.

I'm getting the same glitch when trying to render 3D plans/ dimetric perspectives using section tool.

Hope there's a fix for it.

Hello,

I have a model of a random building, and I'm trying to achieve rendered elevations using a spherical light as fake Sun.

This spherical light is inside a group with a reference axis so it is rotated in ways all elevations can receive light, assigned to a layer i.e. SUN EAST/ NORTH ETC. I hide the unnecessary layers within the specific elevation scene, but when rendering, V-ray shows light from all spherical lights, even if they're hidden/ deactivated layer ... tried both ways > layers or hidden group which contains the light entity.

Any idea how to solve this?

@siobhan said:

****I have managed to work around this by exploding & re-componenting the components - an understanding of why would still be great to know!

Though exploding the darn thing makes the leaves and other organic pieces look strange. I'm using mostly 2D textured leaves, but they look good before exploding, then everything becomes chaotic.

@andybot said:

If the file is heavy - sometimes going from frame to frame in SU doesn't get synced properly with what is sent to Vray. SU camera is lousy.

Maybe try adding more keyframes so the swing in the SU camera is less dramatic.

Yes, the model is big, a mansion surrounded by vegetation (50%) proxies, facade details, and displacement materials like brick and roof cover.

Good, I'll try that... thanks

There is a problem though. Frames were rendered, but some of them are tilted, any reason why?

When merging the frames in post processing video sequences appear tilted, and I've checked through each frame, finding some tilted frames which I was needed to remove and re-merge everything. Still, removing even one frame is noticeable wether the movie is in slow/ fast tempo.

Hello,

Tried to figure out how to create a fly-through animation with VfSu 3.4 following the 2.0 tutorials, but some of the settings do not show up on the interface, like "Don't render final image", needed to precalculate LC and IR.

Any workaround for this?

Everything else useful for animating walkthroughs is present : LC settings and IRmap seetings.

LE: Found it, VfSu 3.4 doesn't need "Don't render final image", it's only a few basic settings:

1. Irradiance Map - Disk Caching set to -Incremental add to current map-
2. Light Cache - Disk Caching -Fly throgh-
3. Animation -Entire Animation- and set an output file location

Hit render and it'll do the job. At first, a blurred image will show, then everything will clarify when V-ray goes through each frame.

It could be a trick faking the order of layers. You have your main diffuse, you add a reflection layer with a texture linked to it, then swap order of layers. Or, if this doesn't do it, make 2 Diffuse layers : one with color, one with a texture [like puddles, imprints]. swap it the way you like. Then drag-n-drop the bitmap slot of Diffuse in Reflection.

If that doesn't do it, you need to separately scale the puddle-imprint texture to your diffuse texture.

Anyway...

I solved it. For further notice, watch what models you copy/ import in your sketchup or they might waste your scenes and your nerves.

The whole thing was a model with some unknown properties that I copied inside my Skp. I made a backup before that change in which V-ray worked without a problem so I'm using it carefully.

@kimi kimi said:

To make sure, you let it finish and this is how it turned out? You didn't save the image half way through rendering?

Yes. Event tests have the same result. Tried to separate the model on layers and hide useless objects too, but with no result.

*attached a complete saved image.

Hello,

I'm encountering an issue in V-ray 3.4 - some areas of rendering are black and some with splotches - reflection areas etc.

At first I tried to move the camera, thought it was a camera issue. Then I thought it is because of texture transfer rate - V-ray and SU are installed on my SSD and the model is on the HDD - moved the model to SSD and tried render from there, with no result. And I'm not using Swarm either.

Any idea what it is and how to solve it?

@murina said:

Hi All

in V-ray 2.0, PNG output, glass materials were transparent by default, so it was easy to insert background in post production.
How to set it up in 3.4?

Thanks!

Alpha contribution -1.0

That is really useful, thanks a lot. Attached is a rendering with some setting tweaks, which lasted 2h30min to "cook".

@burlynomad said:

What is your noise & min shading rate set to?

Yeah, no more material subdivs...its all render settings now.

If you dont want to mess with the settings too much and you're happy with the rest of the render, you could make sure you're switched to progressive rendering and just do a 'region render' and render only the glass areas. That way all of your subdivs will focus on the small regions and clean it up faster/better. Sometimes you cant see the seams from the consecutive renders, but sometimes you may need to composite in post and clean up the seams.

But, to fix your problem without doing a 'work-around' while just doing a normal render, I think you'll have to take a look at your min shading rate.
Chaos Group definition: "Shading Rate – Controls how many rays will be used for calculating shading effects (e.g. glossy reflections, GI, area shadows, etc) instead of anti-aliasing, and more effort will be put in the sampling of shading effects."

With the new system in Vray 3.4, if you're using progressive with brute force, the only things you should have to mess with for quality is noise level and shading rate...aside from image size, of course.

Bump your min shading rate up and noise level down until things clean up to your liking. You can add sample rate pass to your render elements to see where your noise is compared to your anti-aliasing to help you figure out your next move.

While you're at it, you could also add a denoiser pass, it will add another render element with way less noise that you can use as your beauty pass or just composite parts you want in post. With 'way less noise' comes way less detail...thats why you may want to just use certain parts of denoiser pass.

If you share your render settings, may be able to give some more customized help.

cheers

Thanks for your answer!

I cannot attach vropt file, unfortunately. I've seen that from noise setting 0.005 noise starts to disappear along with Denoiser pass. I'll try with your recommendation and see the result, I will attach it here when ready.

Hi,

Any idea how can I increase subdivs on Frosted Glass effect with backlight, it looks too noisy. Or if this effect can be tweaked directly from render settings? Thanks.

Hi,

How can I make V-ray 3.4 use the virtual RAM when the physical one fills up?

You can export the alpha of the render and replace the HDRi with a beach image.

The alpha is the black and white channel which you can use to tweak or replace what's behind transparent surfaces. In Frame Buffer window you have a white circle near RGB values, switch that on and save your file.

Then in Photoshop or Gimp or whatever post production software you use, replace the black with your desired image of a beach.

@zimmerkl said:

When I render a photo matched texture in V-Ray it distorts. See Below.

Podium renders the same file w/out distortion.

Does anybody know if this issue has been corrected in V-Ray 3?

Since I got that distortion, I started modeling stuff from scratch. Another option could be "Make Unique Texture" directly in SU, which will make the face gain the single texture of window/ cladding/ whatever... but sometimes Make Unique Texture doesn't work good because the object on which you project the texture, goes white.