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If you are getting the following issues:
- While interactive or production rendering with Corona, the whole system freezes, you are getting mouse cursor stuttering, or there is some other kind of "slowdown"
- Performance randomly goes back to normal
- This happens even in very simple "teapot" scenes
- You observed that previous Corona versions worked smoothly and Corona 12 Update 1 Hotfix 1 is suffering from this problem

The solution is to fully update your Windows. The required Windows Update is 26100.3321 (KB5052093) or newer.
Please also make sure you are using the newest version of Corona from https://www.chaos.com/corona/download

If updating Windows doesn't help, please go to your BIOS and disable an option called EXPO (sometimes it is also called XMP or DOCP - it's responsible for memory overclocking). The option should say "disabled" or "off".

Big thanks to forum user Quest, who actively investigated the issue and shared updates with us!

Note: this topic is closed as it is just an announcement. If you would like to comment, please do it in the dedicated topic: https://forum.corona-renderer.com/index.php?topic=43755.0

7

[Max] Daily Builds / Faster caustics + volumetric caustics playground!

« on: 2024-10-11, 18:06:57 »

The newest daily build of Corona features new improved caustics. They can be used inside volumes, be it global volume, Corona Volume Grids, Phoenix simulations, smoke, fog, murky water - you name it! They also generally render faster both on surfaces and in volumes. You can also control the intensity of surface caustics and volume caustics independently (in Render Setup > Performance).

Please note that this feature is still a work in progress, so treat the following examples as pre-production samples. We are working on further improvements!

Quick how to:
- Set up your objects with volumetric materials
- Cast some caustics onto them (directly with a Corona light, through a refractive object, reflected off a metallic surface,...)
- Make sure you have the Caustics Solver enabled in Render Setup > Performance
- Render!

Comparison 1 - https://corona-renderer.com/comparer/rrnDiG

Comparison 2 - https://corona-renderer.com/comparer/TEvjq2

8

[C4D] General Discussion / Corona 12 and Vantage

« on: 2024-08-28, 15:06:15 »

Hello, I am starting this thread as a place to ask questions, report issues, showcase renders, and anything else related to Corona + Vantage!
As a reminder, if you wish to request a new feature, please see this forum thread.

As the first step, be sure to check out our Corona for Cinema 4D + Vantage tutorial:

We also have text guide with simple step-by-step instructions at https://support.chaos.com/hc/en-us/articles/26743395447441-How-to-Export-and-Render-Scenes-in-Vantage-with-Corona-12-for-C4D

9

[Max] General Discussion / Corona 12 and Vantage

« on: 2024-08-28, 15:03:58 »

Hello, I am starting this thread as a place to ask questions, report issues, showcase renders, and anything else related to Corona + Vantage!
As a reminder, if you wish to request a new feature, please see this forum thread.

As the first step, be sure to check out our Corona for 3ds Max + Vantage tutorial:

We also have text guide with simple step-by-step instructions at https://support.chaos.com/hc/en-us/articles/26409440770961-How-to-Export-and-Render-Scenes-in-Vantage-with-Corona-12-for-3ds-Max

10

[C4D] Tutorials & Guides / Instructions for improving your experience with Chaos Documentation Portal

« on: 2023-10-12, 14:26:35 »

Hello there, fellow Chaos Documentation enthusiasts!

This video highlights some of the features that can help you when browsing the Chaos Documentation portal: from tips on how to find the information you need quickly and effortlessly, to how to optimize the display of the info.

We hope this video helps you toward an effortless documentation experience.
Feel free to drop your comments and questions right here in this thread.

Please keep in mind that you can also access a separate Corona Help Center, which focuses mainly on how-to's and troubleshooting and lets you connect with our support team by submitting a ticket.

11

[Max] Tutorials & Guides / Instructions for improving your experience with Chaos Documentation Portal

« on: 2023-10-12, 14:23:32 »

Hello there, fellow Chaos Documentation enthusiasts!

This video highlights some of the features that can help you when browsing the Chaos Documentation portal: from tips on how to find the information you need quickly and effortlessly, to how to optimize the display of the info.

We hope this video helps you toward an effortless documentation experience.
Feel free to drop your comments and questions right here in this thread.

Please keep in mind that you can also access a separate Corona Help Center, which focuses mainly on how-to's and troubleshooting and lets you connect with our support team by submitting a ticket.

12

[C4D] Daily Builds / Depth of Field Highlights Solver playground!

« on: 2023-08-09, 11:01:44 »

Not really a daily build feature, since Corona 10 is already released, but we didn't have a dedicated playground thread for this, and we are super curious about your results, so here it is!

If you are rendering a scene where highlights are blurred due to depth of field (distant city lights, interior lighting, reflective/refractive objects), you can enable the new DOF Highlights Solver to get faster rendering.

You will find the checkbox in Render Settings > Corona > Performance settings. You don't have to change the Budget and Reprojection values as the defaults work well (but you are welcome to test them if you wish!).

You also need a camera with depth of field enabled.

Example 1 - Same render time - Click to open interactive comparison

Example 2 -Same render time - Click to open interactive comparison

You can learn more about the new Highlights Solver and DOF in general at:
- Corona Help Center
- Corona Documentation

13

[Max] Daily Builds / Depth of Field Highlights Solver playground!

« on: 2023-08-09, 10:54:59 »

Not really a daily build feature, since Corona 10 is already released, but we didn't have a dedicated playground thread for this, and we are super curious about your results, so here it is!

If you are rendering a scene where highlights are blurred due to depth of field (distant city lights, interior lighting, reflective/refractive objects), you can enable the new DOF Highlights Solver to get faster rendering.

You will find the checkbox in Render Setup > Performance > Performance settings. You don't have to change the Budget and Reprojection values as the defaults work well (but you are welcome to test them if you wish!).

You also need a camera with depth of field enabled.

Example 1 - Same render time - Click to open interactive comparison

Example 2 -Same render time - Click to open interactive comparison

You can learn more about the new Highlights Solver and DOF in general at:
- Corona Help Center
- Corona Documentation

14

News / Chaos Corona 10 Benchmark

« on: 2023-08-08, 15:03:27 »

With Corona 10, we released a new version of the Corona Benchmark app.

The Corona Benchmark is an application based on the Corona 10 rendering core which measures your system performance by rendering a scene with Corona 10 without having to run (or even install) any other software. It can be used to measure how well your system performs when rendering with Corona and you can compare your score with other users' results to make sure your hardware is running as at its full capacity or just for fun!

Some other uses include:
- Comparing what improvements (if any) result from changing something about your hardware, BIOS settings, or Operating System settings
- Making an informed decision on what hardware to buy by making sure it gives you a notable performance improvement
- Stress testing the machine to make sure that the cooling can keep up with your CPU when it is hard at work (via command console)

Check out the following resources:
- the blog article - https://blog.corona-renderer.com/chaos-corona-10-benchmark-released/
- the documentation - https://docs.chaos.com/display/CRBENCH/Corona+10+Benchmark+Help
- the Benchmark download page (Windows and Mac) - https://corona-renderer.com/benchmark
- user scores - https://benchmark.chaos.com/corona/v10/scores

15

News / Corona 10 for 3ds Max and Cinema 4D released!

« on: 2023-06-23, 10:38:29 »

Chaos Corona 10 for 3ds Max and Cinema 4D released!
Let yourself be driven by creativity, thanks to Corona 10's focus on giving you a smoother workflow and more artistic options so that you can achieve the results you want!

Full details and download: https://blog.corona-renderer.com/chaos-corona-10-released/

Easily add cracks, dirt, stickers, etching, embossing, and more thanks to individual control over the material channels (Diffuse, Displacement, Metalness, etc.) affected by a Corona Decal.
Fly cameras through smoke and clouds, or have them half-submerged in water with accurate rendering from Cameras inside volumetric materials such as those from Phoenix simulations.
Brighter, more accurate Caustics when rendering to large resolutions.
Greatly improved highlight blurring when using Depth of Field.
Easily find and adjust scatters, lights, proxies, displacement, and cameras using the new Listers.
Apply the same Triplanar, Color Correction, or Mapping Randomizer settings to multiple maps at once with new multi input and output options. No longer will you have to edit multiple nodes or spend time setting up control nodes to keep different maps in sync.

For this release, everyone gets a full 30-day trial period, even if you have used a trial before, to give you time to try out all the new features.
Remember, you can read about this release in detail over at https://blog.corona-renderer.com/chaos-corona-10-released/

News:

Topics - maru

[Max] Bug Reporting / MOVED: Strange camera "jerk" while using IR

[Max] Bug Reporting / MOVED: object transform bug during IR

[Max] General Discussion / MOVED: Long Render Times with 4080 Super + Ryzen 9 7950X – Is This Normal?

[Max] General Discussion / MOVED: Im getting longer render times when using long focal lenghts, is it normal ?

[Max] Bug Reporting / MOVED: Volume fog behaves differently depending on timeline selection

[Max] I need help! / Ryzen 9950X performance issues (freezes)