Upgraded to RTX 2080 Ti. Now unable to render in Iray???

mikethe3dguy

Previously, with my GTX 980 Ti, I had no problems with Nvidia Iray viewport preview or Iray renders, just not fast enough for my needs. Now I seem to have lost the ability to see ANY Iray output at all. When I select Nvidia Iray preview in the viewport, I just get a constant "preparing scene" on the lower left, and all I get is that in-between view of the scene when the GPU is working on generating Iray. If I try to do a render a simple scene, it processes so quickly I can barely see the render progress window flash, and it's finished in milliseconds or less than 2 seconds, but the render is blank, no image.

What the heck is going on?

Running DS 4.12.1.16 Pro Beta at 64 bit on Win 10. 

Gordig

Check your advanced render settings. Have you enabled the 2080 as a render device?

mikethe3dguy

Yes, it's set, and CPU is un-checked.

mikethe3dguy

Aha, got it. The Nvidia driver was quite a few generations old. I guess the driver disc they ship with the cards doesn't include a relatively current GeForce driver. Strange. Updated it, now it's screamin' like I'd hoped it would.

kenshaw011267

Always download a new driver from the Nvidia website when you install a card

 

mwasielewski1990

mikethe3dguy said:

Aha, got it. The Nvidia driver was quite a few generations old. I guess the driver disc they ship with the cards doesn't include a relatively current GeForce driver. Strange. Updated it, now it's screamin' like I'd hoped it would.

Sorry for going a bit off-topic, but it seems like not many people have the 2080ti. How's the render speed improvement with the 2080ti? I have the 1080ti and I'm wondering if the RT cores acceleration implemented in DAZ's 4.12 build is worth it. 

My 1080ti renders a very nice image in 1080x1440px resolution, with DOF, render quality set to 300 in around 30 minutes (~3000 iterations), with 9 out of 11gb memory used. How faster would the 2080ti be with Daz 4.12?

Could you post some 'benchmark renders' (with render times and quality settings)?

kenshaw011267

There's a whole thread of RTX benchmarks.

RayDAnt

mwasielewski1990 said:

mikethe3dguy said:

Aha, got it. The Nvidia driver was quite a few generations old. I guess the driver disc they ship with the cards doesn't include a relatively current GeForce driver. Strange. Updated it, now it's screamin' like I'd hoped it would.

Sorry for going a bit off-topic, but it seems like not many people have the 2080ti. How's the render speed improvement with the 2080ti? I have the 1080ti and I'm wondering if the RT cores acceleration implemented in DAZ's 4.12 build is worth it. 

My 1080ti renders a very nice image in 1080x1440px resolution, with DOF, render quality set to 300 in around 30 minutes (~3000 iterations), with 9 out of 11gb memory used. How faster would the 2080ti be with Daz 4.12?

Could you post some 'benchmark renders' (with render times and quality settings)?

See the thread linked to in my signature. There are 1080 Ti vs 2080 Ti numbers galore.

stephenschoon

kenshaw011267 said:

Always download a new driver from the Nvidia website when you install a card

 

+1

Never use the drivers from an included CD, always get the latest from the interwebs,,,

Gogger

Agreed - pretty much true with ANY tech, by the time the driver is written, the CD's are burned, labelled, and packaged with the product, shipped to distribution warehouses, stocked on shelves in stores (or customer distribution warehouses i.e. Amazon) and then purchased by you and installed, any software on that disc is loooooong out of date. Always download the latest drivers/software!  

mikethe3dguy

mwasielewski199:

I can only say that just prior to upgrading I had been struggling with a scene that, no kidding, I had rendered for well over 24 hours with my previous GPU (GTX 980 Ti) and ended up canceling render at about 92% because I needed my PC back. After upgrading to the RTX 2080 Ti, that same scene rendered to 100% (well, 99% since that was my Render Converged Ratio setting, in just over 3 hours. Yes, still a long time but it is very texture map heavy and has quite a few lights. I have tried some other (more typical) scenes and in general I'm getting at minimum a 15% faster render (really simple scenes) to 4x faster. So far I'm finding that the more complex the scene, the bigger improvement I'm getting. I've still only about 8-10 renders since upgrading, but that's what I've got so far. 

kgrosser

@mikethe3dguy:

can you tell me something about interactive IRAY viewport? I'm using a 1080Ti currently, so I have an 5Gig NVRAM edge over your former 980 for sure, but still, the lag is bugging me big time enough to consider throwing some more money at nvidia.

mikethe3dguy

I don't know how to quantify it effectively for you, but I can say that I think I'm seeing at least a 50% speed increase in interactive viewport, possibly more. Prior to the upgrade I mostly used interactive mode as a pre-render check for lighting adjustments, fix poke-throughs and just general pre-render tweaks. Now I find myself using it significantly more often.

kgrosser

Thanks. If the Titan RTX wouldn't double the price proportional to the increase of VRAM, I'd strongly consider this. However, on the other side, I threw a Titan GTX into my machine the weekend to se if it would have any impact to dedicate this for video output or have them both coontributing to the interactive viewport - which in both cases was a negative. I also feel that DAZ isn't truely optimized for having the GPU involved in IRAY viewport rendering - even on smaller scenes that do just use a fraction of the VRAM  the machine suddenly jumps to 100% CPU load occupied by DAZ and even staying so when reverting to texture shaded and having DAZ sitting idle. When I compare that to what this machine is able to achieve with the latest game engines and even in VR, ALAS, I think that's the trade off when you deal with "free" software....