Does daz studio 4.21 change the way hdri maps light the scene?

Redgamer369

Does daz studio 4.21 change the way hdri maps light the scene?

                    I'm aware that Daz version 4.21 change the way ghost lights works as well as some other changes. What I'd like to know is does 4.21 change the way HDRI maps works as well? I'm primarily using paper tiger hdris and I can't work without them if they don't work properly after I upgrade my daz studio 4.15 to 4.21. Does anyone has experiance with this?

 

                Any help will be greatly appreciated.

felis

I have not experienced anything different with HDRIs.

The case with ghostlights, was that it used a "feature" which NVidia considered a bug, and therefore changed.

Redgamer369

Thank you very much felis. After reading just one more positive reply from someone like you. I can make up my mind and yes I do have a problem worrying too much.

 

crosswind

Actually you don't need to upgrade your General Release 4.15 for the time being, just install a latest Public Build version to have some experiment beforehand... it's a common practice.

Redgamer369

Well the case is I'm on my way to buy a 4070 12 gb from amazon and as far as i'm aware there's no chance 4070 going to work with daz3d 4.15. So whether i like it or not I have to upgrade. Buying a 3080 12gb is also a good alternative that way you only have to update the nvidia driver, but the thing is 3080 12GB is ridiculously overpriced for me. I'm not sure I could afford a 1100$ or so GPU for the moment. I will try to explain the annoying situation i'm in as clear as possible so someone can give me an advice.

I need 12 GB vram to render scenes with 3-4 models with a medium environment or sometimes a bit complex environment.

3060 12 GB is a good option and it works 100% okay with daz3d 4.15 I know about that, but the problem is that 3584 or so cuda cores, currently I own two pcs, one with 3060 and one with 3070 8 GB and I can clearly notice the speed difference between the two so I cannot make my mind to use my 3060 for years to come.

That leaves 4070 12gb as the only budget friendly option for me and what is the issue this time? Well you cannot use 4070 with daz3d 4.15 and I'm not sure what changes 4.21 would brings along with lovelace architecture.(I primarily works with paper tiger HDRIS and mesh lights and I'm very sensitive to any changes happen to my lightning setup with the new daz version.)

Like I said 3080TI or 3080 12GB another good alternatives for me but them are too costly, however if I have no other choice but to buy a 3080 12GB to keep things simple and like before  then I will go that way.

                       Thanks in advance for any assistance.

 

crosswind

Okay, that's the story.. but I wonder why you didn't install your 2 cards within one PC, no space or sth.?  If they work together, you'll have better performance in terms of rendering than a single 4070... ttl 20GB VRAM, nearly 9500 CUDA Cores...

Redgamer369

You can combine two GPUS but you can't combine the two vram capacities like you suggested. I had to read a few posts in order to understand this. When you combine two gpus let's say a 3060 12gb and a 3070 8gb you can use both gpus to render in a dual gpu setup but as soon as your scene eat more than 8 gb vram you no longer can use your 3070. After reading those posts I didn't even bother look in to that idea more. here's some links for you.

https://www.daz3d.com/forums/discussion/364341/dual-gpu

https://www.daz3d.com/forums/discussion/505456/dual-gpu-render-efficiency

crosswind

gammanapatabendigechandrasena said:

You can combine two GPUS but you can't combine the two vram capacities like you suggested. I had to read a few posts in order to understand this. When you combine two gpus let's say a 3060 12gb and a 3070 8gb you can use both gpus to render in a dual gpu setup but as soon as your scene eat more than 8 gb vram you no longer can use your 3070. After reading those posts I didn't even bother look in to that idea more. here's some links for you.

https://www.daz3d.com/forums/discussion/364341/dual-gpu

https://www.daz3d.com/forums/discussion/505456/dual-gpu-render-efficiency

Some info. there are not really correct in terms of using multiple cards...  I've been using 2 - 4 cards (with or without Nvlink) for years and ever organized quite a few people to make lots of tests with different hardware combinations... So one better have some hands-on experiments before telling the facts or giving guideline...

In your case, connect your monitor to 3060 (2 cards installed), run single instance of Ds only - with default empty Viewport, then press Ctrl + 0...Ctrl + 9 to get the 'readiness' before loading a scene. Open GPU-Z to observe the available VRAM,  you'll have appr. 8GB + 7.5GB. Then you'll have chance to render a scene that totally consumes 12 - 13GB VRAM (Minimum, Viewport + Rendering).  As long as the allocated consumption does not exceed the availabe VRAM on a single card, both of cards will be working well and more Cuda cores will bring you 'speed'. You never have chance to make these happen with only one card installed... so it's worth trying.

As for Nvlink or VRAM pooling relevance, pls check RexRed's testing video: https://www.daz3d.com/forums/discussion/617831/is-it-worth-having-2x3090s-in-nvlink-when-it-does-not-work-in-daz

PS: Nvidia is 'greedy' indeed ~

Redgamer369

Hmmm that got me really curious now. I'll look into this dual gpu path some more in that case. Thanks crosswind.

Redgamer369

Well to be honest I'm still confused? there are certainly some good points discussed in your link and that video by rexred is really intriguing(I couldn't understand the entire video right away but i'm going to watch it a several times until I do.)In any case, no matter where I go people keep telling me cuda cores can work together under the same Nvidia driver but Vram can't get combined that same way. They all support this same theory that if you want to render a scene that consume something like 9 gb vram and your pc have two gpus naming let's say 3080 10gb and a 3060ti 8gb then only the 308010gb will get to render the scene while 3060ti sitting idle. you can only use both gpus if only your scene fit together in less than 8 gb space. I don't know if they are saying this with real life experience or not. But there are some pretty influential individuals that also agreeing with this . I just don't like things to get more complex than necessary so I'm going to send a support ticket to dazstudio team and Ngreedia iray team regarding this and I'll have to make my final decision based on that.

Buying a new motherboard that has two pci express slots and a new 850w-1000w power supply unit is certainly much cheaper than a new GPU if i can get 20gb maximum video memory for rendering. But lots of people discarding this concept. And it's not a good thing.

If i have to buy a 3080 12gb to keep things simple as possible then so be it.

Thank you very much for taking your time to look into this crosswind, I really appreciate that.

crosswind

gammanapatabendigechandrasena said:

Well to be honest I'm still confused? there are certainly some good points discussed in your link and that video by rexred is really intriguing(I couldn't understand the entire video right away but i'm going to watch it a several times until I do.)In any case, no matter where I go people keep telling me cuda cores can work together under the same Nvidia driver but Vram can't get combined that same way. They all support this same theory that if you want to render a scene that consume something like 9 gb vram and your pc have two gpus naming let's say 3080 10gb and a 3060ti 8gb then only the 308010gb will get to render the scene while 3060ti sitting idle. you can only use both gpus if only your scene fit together in less than 8 gb space. I don't know if they are saying this with real life experience or not. But there are some pretty influential individuals that also agreeing with this . I just don't like things to get more complex than necessary so I'm going to send a support ticket to dazstudio team and Ngreedia iray team regarding this and I'll have to make my final decision based on that.

Buying a new motherboard that has two pci express slots and a new 850w-1000w power supply unit is certainly much cheaper than a new GPU if i can get 20gb maximum video memory for rendering. But lots of people discarding this concept. And it's not a good thing.

If i have to buy a 3080 12gb to keep things simple as possible then so be it.

Thank you very much for taking your time to look into this crosswind, I really appreciate that.

 

First pls check this link: https://raytracing-docs.nvidia.com/iray/manual/index.html#iray_photoreal_render_mode#5230

I still have not dropped my two old Quadro 6000 because they're stable and useful, however, I sold my Nvlinks long time ago... In most cases, well use the hardware on hand may be an optimal way... But still, you have to make sure your 'scene size' could be controllabe. If you really aim to make and render big scenes without loosing 'quality', there'll be no better way but just go for upgrading your cards. For 'big scenes', VRAM is the king ~