Problem with "Cast shadow" on clouds

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1

Hi, whenever I try to use the “Cast Shadow” option for the Clouds, the preview starts blinking, alternatively showing the cloud’s shadow and not showing it…
When I render, I don’t have any shadow from the clouds.
I’m working with two PCs, one on a RTX 4060 laptop, and the other on a RTX 4070. Same problem on both.
Problem appeared a few versions ago.
Any ideas?

2

Hi @photomontage

I apologize for the inconvenience. Can you send us a screenshot or video recording of this particular issue that you are experiencing?

  • You may want to try to update your Graphics Card Driver to its latest version. You can update it via NVIDIA GeForce Experience Application.

Aside from that, please also send us the following images:

System info
System info2399×660 520 KB

VRAM
VRAM1197×722 32.2 KB

image
image992×707 27.1 KB

3

Hi, sorry for the late reply.
Problem apparently solved by installing the latest Nvidia drivers (Game Ready) WITH the option to uninstall the old drivers.
I’ll keep you informed if the problem shows again.

4

Hi @photomontage

Thanks for the update. Which driver version were you using before and after?

5

Hi Clov,

I stand corrected, problem is still here. Sometimes it’s ok, sometimes it’s here. Restarting D5 sometimes solve the problem.
On renders Shadows from the clouds arn’t showing…
New version of the driver is GeForce Game Ready 576.02. Didn’t check wich one it was before.

Please find the required screenshots below.
A video recording of the problem can be seen here: Screen recording

Capture d'écran 2025-04-29 115221
Capture d'écran 2025-04-29 115221700×488 159 KB

Capture d'écran 2025-04-29 115333
Capture d'écran 2025-04-29 1153331394×802 46.3 KB

Capture d'écran 2025-04-29 115345
Capture d'écran 2025-04-29 1153451406×808 43.3 KB

6

Hi @photomontage

Thanks for these images and video recording. I may need to clarify a few things.

  • Does this issue occur in a specific file only, or is it evident in all of your files?
  • This issue only occurs when the Cast Shadow option for Clouds is enabled, right? And if its disabled is it normal?
  • Can you please check whether the surface of your model and D5’s Terrain are clashing?

Recommendations:

  • Please revert back to the previous version of your NVIDIA Driver since 576.02 is known to have several issues. I suggest using 572.47 for now, up until NVIDIA has released an official fixed version.
    image
  • Please try to disable FPS Booster or Frame Generation and see if the issue persists.
    Super Resolution and FPS Booster
7

Hi Clov,
Sorry for late reply.

  • Issue occurs in all files
  • Only when “Cast Shadows” option for Clouds is enabled
  • No clash between D5’s terrain and the model surfaces
  • FPS Booster and Frame Generation are off.
  • Driver version is now 572.47
8

Hi @photomontage

Can you please try to use the Demo Scene File - Residence Lawn and enable “cast Shadows” then see if the issue persists. You may attach a recording of it too.

  • I was able to try it on my end using the Demo Scene file and there were no blinking in the preview screen when I enabled “Cast Shadows”

You may also send us your scene file and log file to support@d5techs.com and have it titled ‘Clov-Forum Problem with Cast Shadow on Clouds’

9

Hi, may I ask if the problem is solved yet? I’m experiencing the same issue

10

Hi @nhat8877

I apologize for the inconvenience. Please try the following:

  • Update your Graphics Card Driver
  • Try to disable any of the following: Super Resolution, FPS Booster, DLSS, or even Path Tracing and see if there are any differences.