You should check/ask at Vray official forum for such information or release notes in the manual.

I am getting this same issue only when using Progressive rendering and GPU acceleration.

Chaos people solved this for me: A recommended workflow to achieve transparency of glass in a .png image would be to adjust the settings of the glass material. In the 'Refraction' rollout, change the 'Affect channels' parameter to 'Color + alpha'.

Maybe it's grouped too deep. I had a few pieces of render missing when I grouped a group inside a group inside a group etc. Try also resetting to default vray render settings, if you haven't tried it already. What also might be the case is that you have some material ID channel, or some other channel, chosen in Vray frame buffer. In upper left corner, check that. What's strange here is that those chairs on top don't look like the chairs in bottom picture...

It's likely to have such render differences between versions. I suggest asking in ChaosGroup forum in order to get a proper response.

To me second image looks better 😎 i feel like a Brightness & Gamma issue but i'm not sure.

Check this V-ray manual for Migrating from Previous Versions.

I don't think anyone is going to go through that effort to make a tutorial for you. But you should turn on swarm option in your render settings, install V-Ray Swarm on your other computer(s), run it, make sure all computers are connected to same network, hit render. That's the basics, but there could be many different issues, try and see. Write if you run into a specific problem.

Make sure you ticked the 'Spherical' option. So that image wraps around and you won't see plain ground.
And i think your only option is rotating (i might be wrong). But making changes other than rotating doesn't make sense, because it'll shift the horizon etc.

@pilou said:

No I speak about "accelerate" an object above an open path... 😄

On the beautiful new plane animation by Charlie - seems plane has a constant speed![/img]

Easingis precisely there to change the speed of any movement, based on profile (Polynom, Bezier, etc...).
You set the Easing for the element in the timeline, not in the Movement Editor.

Fredo

@thomthom said:

Could you temporarily disable it?

I tried it... no difference. 😞

Thats great! Nice looking render. I love this design, btw. Very cool...the car is a perfect fit here, too. 😄

Are you using light dome/HDRI or Vray sun to light the scene? If light dome/hdri, you can up the texture resolution from 512 up to 2048 for some more GI quality. (at the cost of higher render times, of course 😉

With low light renders such as this, you're always going to need higher settings to reduce noise...and longer render times. Although there are tricks to getting around this which happen in post.

From here you can save the render in frame buffer history, then do small render regions on problem areas while tweaking one setting at a time to figure out what works/helps and what doesn't. So, depending on what renderer/GI method your using, you may try upping the min shading rate a bit or lowering the noise threshold if using brute force. Or if using Irradiance Map, try raising Quality subdivs and/or Irradiance map subdivs. If done correctly, your region renders should merge with the whole render, if not, just save them all and smooth out the seams in photoshop. Unfortunately, the denoiser passes when using render region leave the rest of the render outside the 'region' black....so they have to be composited in post...hope they fix that soon. Let me know if you have any more questions about anything. Good luck and have fun! 😉

On a side note - if this were my project, I would like to see how things look with the architecture lit up more. Maybe more exterior lighting to really accentuate the building. I like the mood you have here, but overall its a bit flat. More lighting like you have around the base structure could really make things pop.

cheers!

@numerobis said:

No, it's not new. I already described the problem in the v2.0 release thread
http://sketchucation.com/forums/viewtopic.php?f=397%26amp;t=67013#p614977

Oh, I did not notice that original post. Sorry.

Can you start a new thread on the topic? (I've not heard anyone else describe this, so it's probably not going to be trivial tracking it down. I'd rather track this in a separate thread.)

@filibis said:

instead of replying in a group here.

LOL! Yeah, you won't receive much feedback there... look at when the last post was made in that group and there are no responses.

Like I said, Chaos Group does seem to be aware of some bugs that cause geometry in the model to be manipulated during the render and are working on some fixes. I think the most helpful thing would be to send a file that exhibits this behavior directly to support. You're more likely to get a helpful response if they have something specific they can work with, and it will help them troubleshoot the problem.

Best,

Andy

usual suspect: displacement.

TL;DR version:
Go into LIGHTS -> Sunlight -> Caustic Photons and change the EMIT RADIUS there. The units are in your model units. And the center starts from the sun's location.

Full explanation:
Vray projects a beam with an 'Emit radius' when rendering caustics. Where that edge ends, you'll see a cut-off line.
In 3ds max you can set this emit radius' direction and size visually. Buuuht, not here.

In Sketchup the sun is the emit source, so depending on time of day(!) you'll have to fiddle with the emit radius.

The attached image has three swimming pools: at 34' from the origin of the blue axis (0,0,0), then again at 60' and again at 90'.

At 1:00pm the sun catches all the pools nicely, but the 2d and 3d pools aren't getting enough caustic photons to show caustics properly (top half of image), because the emit radius is set to 700, which doesn't extend far enough.

NOTE: The units of this model is inches, so that's 700 INCHES or 58.3'. The yellow circle has a 59' radius, and you can see the 'dark line' cutting through the pool.

The second render shows the emit radius set to 1080" (90'). This time the third pool is captured and begins to render caustics.

Tadah!

vray 3.6 sketchup causticss affected by emit radius setting under Sun->caustics menu