RTX speed increase?

[joconnell]

Great timing - the 3000 geforce cards are due to be announced in just over a week and I'm going to jump in to GPU then, the more fixes the better!

[charlyxxx]

Just to let you know I have not forgotten Both the issues with On-demand mip-mapping and RTX have been reproduced locally and we're working on a fix. This is definitely not the expected behaviour. It's vacation season and half the office is out, so it might take a bit longer than usual to resolve, but when we have a fix at hand I will let you know. Cheers

Awesome! Thank you to letting me know.

[charlyxxx]

CUDA Test =)

Still waiting for the RTX fix =)

https://www.youtube.com/watch?v=xcXdzW2Nf4Q

[a7az0th]

Hi there. The root cause has been found, unfortunately it's not an easy fix. It's fundamentally related to how we handle hair in the RTX codepath. It seems that our RTX implementation does not handle very well highly dense hair systems confined in a small area (as is that one braid on your model). We're investigating how to resolve that, but for now I don't have a good solution for you, apart from suggesting trying to optimize the braid and reduce the complexity/ reduce the knot count in a hair system.

[charlyxxx]

Hi there. The root cause has been found, unfortunately it's not an easy fix. It's fundamentally related to how we handle hair in the RTX codepath. It seems that our RTX implementation does not handle very well highly dense hair systems confined in a small area (as is that one braid on your model). We're investigating how to resolve that, but for now I don't have a good solution for you, apart from suggesting trying to optimize the braid and reduce the complexity/ reduce the knot count in a hair system.

Don't worry =) CUDA is very fast on 2x2080Ti =) in V-Ray 5. So I will wait the final fix and until this will render with CUDA. I am satisfied with the result of the work done in V-Ray 5 and understand, that RTX need more time to improve it and etc. I'm already grateful even for that my DOG rendered without any problem with NVLink in v5 =) in Next it had many problems and didn't rendered =) So I trust in you guys =) And I know, that you can improve RTX =) just need more time.

Btw, why Hybrid render(CPU+2xGPUs) slower that 2xGPUs? =) It this another issue? Everytime my 2 GPUs render faster without CPU using =)

[Karol.Osinski]

A lot of interesting information in this thread guys
I am more on Joelaff side when it comes VRay settings accesibility, usually as Muhammed_Hamed everything works out of the box but from time to time you encounter the case where you want to have control over all the knobs. I am facing some slow render time problems currently (for anyone interested I posted it here

https://forums.chaosgroup.com/forum/...ow-render-time

Back when I used 3ds max I love the idea of having Normal / Advanced /Expert subcategories in the settings window, and yes...it is user problem when he switch to expert without knowing what they are doing (I went through it myself and I don't regret it).

The GPU IPR starts instantly for me similar to Octane or Fstorm, you guys need to follow up with support to see what is causing the slowdowns in your scenes.
It is important to follow along and make sure the issues are solved,
I have been using GPU for most projects since 2017.. there are issues, but I think it is in a pretty good spot right now, it is fair to say it is production ready at least for what we do

I believe it could be an issue with high resolution textures being reloaded into VRAM everytime you launch the render, I gotta find out. And okay...I agree that these days it is totally possible to do even heavy Archviz with GPU, though difficult as it requires the whole team to be very attentive when collaborating on the same big, project - something that I am slowly trying to introduce in our studio so maybe within a year or two we go full GPU.

When working on personal projects I go GPU 90% of the time (I only have i7700HQ + GTX 1060 in a laptop so speed gain is very big).