Interior rendering with V-Ray RT GPU 3.5 based on Evermotion scene.

By | Blog, Dabarti | 6 Comments

Today after quick chat with Michał Franczak from Evermotion I’ve decided to test how hard it would be to render one of their scenes on GPU. They have kindly provided Archinteriors vol. 42 for testing and it gave birth to this quick test.

It did turned out easier than I expected. Here is video I’ve recorded of the process:

At first I tested how the settings from older V-Ray are holding up. Than I did 1 min test render with Adv CPU for reference.

Converting to V-Ray RT GPU 3.5 was as easy as switching rendering engine and using CUDA instead of CPU.

Here are rendering results ( I raised LC samples back to 1000 after recording the video for the finals rendering ):
RT GPU render with threshold 0.01, no denoiser. (28 min 52 sec)
RT GPU render with threshold 0.05, with denoiser (7min 57 sec)
Adv CPU render with threshold 0.01, no denoiser. (1h 48min 53s, lighting difference caused by skylight portals)
Rendered on 400USD GPU – GTX 1070 8GB.
For CPU I used 4770K overclocked to 4.2Ghz.

It took only around 3GB of GPU memory for the scene. I was also able to drop it down to 2GB with on demand textures switched on.

Original CPU renders and scenes are available on Evermotion website.

Review of V-Ray RT GPU 3.5 (Based on Beta 2)

By | Blog, Dabarti, Our creations, Software, Tutorials, Updates | 2 Comments


It has been over 7 months since the release of earlier Service Pack and we will be getting another free upgrade in Q1 of 2017. It’s now in public Beta stage. In this post I point out and review newest features and improvements of upcoming V-Ray RT GPU 3.5. I will focus only on GPU side of the engine as I think it deserves way more exposure than it gets. While it may seem like a small addition to V-Ray CPU (Adv) it’s in fact full-blown production rendering engine that paves the way for better and faster rendering workflow.

Over the course of last months I’ve been crazy enough to keep installing latest Nightly builds of V-Ray RT GPU on regular basis and abusing the hell out of it. As I’m sharing all the my testing data, bug reports and improvements ideas with Chaos Group team I also feel partly responsible for its current shape.

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Short guide to GPU rendering with V-Ray RT.

By | Blog, Dabarti, Tutorials | 39 Comments

The aim of this guide is to help with switching to rendering on GPU with V-Ray and has all the basic information needed to better understand advantages and limitations of this approach. Everything below this point is based on our experience with using V-Ray GPU (RT) as our main production renderer.

1. Why GPU for rendering?

It all started around 18 months ago when we decided to do a hardware upgrade to get better 3ds Max viewport performance. So we installed new GPUs (it was GTX970 4GB) and decided to see how things improved with rendering on GPU with V-Ray RT. We loved it!… Well, to be honest not straight away. It took time to change the mindset, but the speed boost and interactivity were there to help and sooth any pain caused by some V-Ray Adv features missing.

It wasn’t the first time I tried rendering on graphic cards. But back when GPUs had 512-1024 MB of memory it wasn’t really a production ready solution (at least for us). It changed with launch of Nvidia’s maxwell cards that came with 4GB on board, did cost fraction of their Quadro brothers and were much faster and more energy-efficient than earlier generation. This alone made it possible to render 70-80% of our scenes.

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Dabarti Light Assistant

By | Blog, Dabarti, Free Stuff, Tools | 18 Comments

Light Assistant helps with aligning reflections and adjusting the parameters of V-Ray lights.

Main features:

  • Interactively ALIGN lights reflection directly on the geometry. Hold shift for “Rim Light Mode”.
  • Interactively change light distance, size and rotation in ADJUST mode..
  • Quickly control V-Ray Light properties with “Light Lister” like interface.
  • Adjust light intensity using Exposure Value (EV).
  • Align and Adjust modes work well with some non V-Ray lights.
  • 10 Softbox presets in material library included.
  • Designed to work perfectly with V-Ray GPU (RT)
  • Added Corona Support




Download : Dabarti_Light_Assistant_v0.901 (24th November 2017)

(Please link directly to this page as the tool gets constant updates this version will be outdated in near future.)

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