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Messages - Nejc Kilar

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No worries, we are bringing the gamma operator back just as we discussed it - and in a more artist friendly form so it comes with a couple of other spinners as well :)

Hardware / Re: Which Monitor is best?
« on: 2024-06-06, 13:57:13 »
If I may suggest so what I found like a good solution for me was to increase the "text size" in Windows. So DPI I have on 125% and text size is set to slightly larger. Found that to be working pretty well for me. I do wear glasses though.

The screen I'm on is equivalent to a 32" 4k display (its the Samsung G95NC).

Hi guys,

Got my 7980X machine. it's really is a beast!

Just one thing I noticed is that it is less workable during IR compare to my old machine which is Ryzen 9 5950X. when I say less workable it is difficult to tweak materials, move object and update objects while on IR.
I understand that in IR it uses the whole CPU, but it is just different experience in 5950X. Anyone experience this?

Here's my specs :

CPU: 7980X
MOBO: Gigabyte TRX50 AERO D rev.1.0
RAM: Kingston 256GB 5600MT/s
PSU: ASUS Aura edition 1200W 80+ Gold

Hmm I don't really think there should be much of a difference. Do you think you could disable SMT and give it a try? Wonder if that would help.

Also, kudos on the beastly machine!!

Well I'm super glad to hear you found our replies helpful - thank you for the kind words!

The motherboard I am using is the Supermicro H12DSi-NT6 - its a dual socket Zen 3 motherboard (you've got Zen 4 CPUs btw). Do note though that if you are going to place this thing into a desktop style case and have it in your office you'll probably struggle keeping the VRMs from overheating. The VRMs on server motherboards are typically "just enough" and aren't necessarily overbuilt hence they rely on that supreme rack airflow that you typically have in server environments.

I currently have it in a Fractal Design Torrent case with pretty much all the stock fans maxed out and it is hitting 90c - at 100c it starts beeping like crazy because danger :) If your server or office environment isn't AC controlled you're probably going to struggle keeping it cool imho so beware. I'm currently thinking of creating a 3d printed ventilation shaft that would direct airflow directly over the VRMs, hopefully that'll help because during summer this thing will otherwise be working in "limited performance" mode :)


Okay, so assuming that you will eventually fix the dual-CPU bottleneck, do you think the AMD Ryzen Threadripper PRO 7995WX 96-Cores (currently @ ~42M rays/s) would at that point be slower than 2x AMD EPYC 9554 64-Core Processor (currently @ ~32M rays/s)?

And finally, how much RAM is enough for such a setup, because I'm seeing 128GB, 384, 512...? Does it depend on the size of the scene or is there a max?

Thank you for your time Tom!

That comparison is a bit difficult to make because 2S systems do have some drawbacks but broadly speaking I would expect the two Epycs to be faster as they are clocked faster (all core) and have more combined cores. Plus you are comparing Zen 4 to Zen 4 so same uArch. As Tom mentioned though it does depend on the bottleneck, how it is fixed etc etc. We'll keep everyone updated on that.

As for the RAM itself, I can only speak from personal experience but I typically buy about as much as I need - regardless of the CPU in use. For me scenes never spill over the 128GB I have so that is the magic number for me. I do have a dual Epyc with 256GB but that is because it was rather impossible to get a hold of 16x 8GB sticks :)

The biggest thing to watch out with memory is that you always have enough to fit your scenes in. If your scene doesn't fit into your memory your OS will start paging the overflow to your SSD / HDD and even though SSDs (NVMEs) are super fast these days they are still a crap ton slower than your system RAM.

There's been talk about having enough memory for high thread count systems so that each core has more to work with but frankly I've never seen any articles or provable points confirming that for when it comes to rendering.

[C4D] Feature Requests / Re: Reverse Material Convertion
« on: 2024-05-28, 13:03:52 »
I have something here, it does the bare minimum, it's hacky, but it works.

Script is attached

You're on a roll dude! Thank you! :)

To be honest at that big of a difference I myself probably wouldn't bother - plus its a laptop so probably best not to have it render  24/7 anyway :) Totally depends on how much compute help you need.

I'm in the process of slowly phasing out my trusty 2x 2696v3 Xeon render node. Not that I don't need it, its a stellar system but it is also about half the speed of my second slowest node which is the 3970x. It is still useful when doing animations (every bit helps lol) but considering it pulls 300W yet gives slower performance than the newest Zen 4 chips at 125W... I'm thinking its about time :)

So I guess it totally depends on your workload?

[C4D] I need help! / Re: Displacement map rendered jagged
« on: 2024-05-22, 15:18:05 »
The issue is not in the bit depth, the displacement texture attached in the first message has only few shades of grey, increasing bit depth won't help in a slightest. The problem is this texture is pushing Corona displacement too hard. You need to blur it slightly, so displacement would have some room to work nicely. The more variance between neighbouring pixels the texture will have, the more chances for artifacts in displacement will be. You can try to reduce displacement size in render settings to combat that, but it has its limits - eventually increased parsing time and RAM consumption will make this solution impractical.

I would also suggest to consider using Corona pattern instead displacement - i think it would be more preferable solution in your case.

Schooled! Thank you though :)

In retrospect, I should have paid closer attention to the attached displacement map.

@mac_bean please do report back on whether you got it working as intended or not.

[C4D] I need help! / Re: Displacement map rendered jagged
« on: 2024-05-21, 11:22:18 »
It's just an 8 bit images im using as displacement map.

I would dare say that is the culprit. 8 bits are typically to be avoided for displacement - they may work depending on the bitmap and what you are trying to do with it but more often than not they'll produce artifacting and one of the most common ones are jagged straight lines.

I'd really suggest looking into 16 bit or 32 bit displacement maps. If you created it on your own then I think it would be best if you'd recreate it from scratch but in 16 or 32 bit mode.

[C4D] I need help! / Re: Displacement map rendered jagged
« on: 2024-05-20, 13:10:58 »
To me that looks like you might be using sub 32bit displacement maps. Can you check the bit depth on that displacement map and report back please?

[C4D] I need help! / Re: HDR vs Physical SKY
« on: 2024-05-16, 11:33:04 »
In my experience and broadly speaking the procedural sun & sky set up will be faster to render out than an HDRI. That said I personally do like to use HDRIs for certain interiors because they can get you really nice subtle details in the lighting - for example you get some greens from the ground, some nice orange from the brick building thats in the HDRI etc etc.

That said the procedural setup is awesome because you have total control over the actual light sources - sure you might need to model some of the environment to get those HDRI like subtleties (that are typically hard to notice anyway) but it tends to render faster. And again, you really can set up the lighting any way you please.

As far as cutting down on render times, you can try the usual GI vs AA balance tweaking but that in my experience gets you minuscule improvements. Corona is optimized as is. You do want to switch the UHD cache to the animation preset though and if you don't mind sacrificing realism then lowering the MSI to 1 might help you clean the noise faster (but the lighting will be darker and some materials less "intense").

Other than that personally I just let it render :)

Hardware / Re: Help with building a new computer
« on: 2024-05-16, 11:22:30 »
Sorry for the late reply, totally missed this thread.

The build seems fine to me to be honest - I'd check if the memory is on the motherboard's QVL list (typically listed under the support web page of the product) but that is about it.

For the cooler I'd also go with a Noctua. AIOs are fine but there's always that extra worry about a leak or a pump failing imho.

As for the CPU, the 14900k is a top performer no doubt but personally I'd go with the 7950x or a 7950x3d. Not because "AYMDEEH" but plainly because they are a lot more efficient power wise so whether you'd like to save a few bucks every month or consume less electricity because Earth. Performance wise they are kind of similar enough I'd say though.

Hope this helps :)

Hardware / Re: Another PC build
« on: 2024-05-10, 12:37:07 »
Howdy! The build looks pretty cool to me although I'm a bit unsure about the memory - those look like RDIMMs to me and if they are then I'd probably switch them out with regular sticks. I keep forgetting if ECC is supported on the consumer platform these days but for Corona you don't really gain anything with RDIMMs. I'd use the saved up money to go with something thats on the motherboard's QVL list and does 5600-6000MT in terms of speed.

Motherboard wise, if you're interested, I think the b650 Pro Art from ASUS might be interesting - it imho has a better PCIE slot layout although you do lose one of the gen5 m2 slots because it changes to gen4 (Pro Art has 1x gen5 and 2x gen4 whereas your choice has 2x gen5 and 1x gen4). This is totally subjective though, I just like the layout on the Pro Art better in case I'd want to run something bandwidth intensive in both the first and second PCIE slots because Pro Art does x8 / x8 whereas the ROG Strix you've chosen does x16 / x4 (because it is via chipset). Again, totally subjective, if you don't think you'll ever run anything like that the one you've chosen is plenty awesome imho.

Oh and the Pro Art has 1x 2.5Gbe and 1x 1Gbe ports built in - if you're running a local render farm or whatever that might be handy depending on how you approach that (I've got my WS connected to the internet via one port and the other port goes to the local network only where the render nodes live :) ).

NVME wise I've recently started using WDs sn770 and sn850xs as they are (to me) quite nicely priced but apparently also amongst the fastest gen4 drives you can get. Compared to your Corsair Core XT choice the sn770 is 40€ cheaper and seemingly faster.
Don't quite me on that but maybe if you look at a couple of reviews and check out your local prices there might be an opportunity so save a couple of pounds there.

Hope any of the above is useful and do note, its nit picking. I quite like your build myself and the only "real" question mark would be that memory.


I was waiting for the "I need moar sleep" comment when you broke then news :) We just got a dog recently and while it is clearly not the same as having a child boy did I not sleep for a week or two. Still recovering lol.

Yeah the CPUs I meant are the Epyc ones and lately we are really putting in a lot of focus on making sure the performance with these system is as it should be.

Still, I don't quite understand why the top of the line chips seem to be discounted by roughly 50% at most stores I'm looking at. Great time to buy though lol.

As for your 7980x, dang, that looks sweet! I'm currently contemplating getting one so all your feedback here is super duper useful. Thank you!

I'll be getting this! Thank you so much for working on it!

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