Vertical line glitch in Raytraced mode

Hi!

I get get weird glitchy vertical lines in Raytraced on my Laptop
raytrace bug.3dm (120.6 KB)
. That happens in the Viewport, as well as with ViewCaptureToFile (see below). CPU and GPU (AMD 7840HS with 780M, updated Drivers: 32.0.11030.7006) rendering show the same result. On another machine everything is fine (Intel Xeon+NVIDIA A5000). It happens with a groundplane, as well as a “normal” geometry for the ground.


raytrace bug.3dm (120.6 KB)

Would be happy to do quick test renders without these glitches. Thanks!

Is this with HIP device or on just CPU? (Tools > Options > Rhino Render)

Hey! It happens with both

For the record can you run Rhino command _SystemInfo and copy the resulting text here in a reply?

I looked at your file, didn’t see anything out of the ordinary. I’m going to try it on my AMD APU still to see if there is anything amiss there.

addendum:

Looks like this on my AMD device

Your groundplane looks very different from what I see here though.

I checked again, and it seems like it its indded HIPs related. the rendering output
also looks different:

HIPS:

CPU:

Rhino 8 SR14 2024-12-10 (Rhino 8, 8.14.24345.15001, Git hash:master @ cdb74b46090a23fe242c51b288886f76467a741b)
License type: Educational Lab License, build 2024-12-10
License details: Cloud Zoo

Windows 11 (10.0.22631 SR0.0) or greater (Physical RAM: 28GB)
.NET 7.0.0

Computer platform: LAPTOP - Plugged in [98% battery remaining]

Non-hybrid graphics configuration.
Primary display and OpenGL: AMD Radeon 780M Graphics (AMD) Memory: 4GB, Driver date: 11-12-2024 (M-D-Y). OpenGL Ver: 4.6.0 Compatibility Profile Context 24.10.30.07.241101
> Integrated accelerated graphics device with 5 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port
- Secondary monitor attached to adapter port #1
- Windows Main Display attached to adapter port #2
Primary OpenGL: AMD Radeon 780M Graphics (AMD) Memory: 4GB, Driver date: 11-12-2024 (M-D-Y). OpenGL Ver: 4.6.0 Compatibility Profile Context 24.10.30.07.241101
> Integrated accelerated graphics device with 5 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port
- Secondary monitor attached to adapter port #1
- Windows Main Display attached to adapter port #2

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: ATI Technologies Inc.
Render version: 4.6
Shading Language: 4.60
Driver Date: 11-12-2024
Driver Version: 32.0.11030.7006
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 18005 MB

Rhino plugins that do not ship with Rhino
C:\Users\cdijoux\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\Karamba3D\3.1.41125\net7.0-windows\Karamba3D_LicensePlugin_Rhino8.rhp “Karamba3DLicense”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 8\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.14.24345.15001
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

It also is a new installation, never had that issue before.

And thank you for your quick reply!

I don’t know why your HIP device renders differently, clearly there is an issue. Assuming you have an 7840HS, and not a 7840HS Pro, I see here https://www.amd.com/en/support/downloads/drivers.html/processors/ryzen/ryzen-7000-series/amd-ryzen-7-7840hs.html a bit newer driver. I don’t know if it will help, but you could try updating to that newer one, and making sure you do a clean driver install. The installer should give you an option to do so.

Other than that I have not a good idea of how to fix this.

If nothing else I suggest you use the CPU to render. The integrated 780M isn’t that much more powerful.

And if you can update to the service release candidate for 8.16 (or get your lab to update to that) you’ll have possibility to play with advanced adaptive sampling controls to make rendering complete faster.

No problem. Raytraced / Rhino Render are my projects, so I’d like to get to the bottom of issues as quickly as possible when I see them on the forum.

it is actually an AMD RYZEN PRO 8840HS, sorry for that. But the AMD-installer is the same for that APU and it didn’t help unfortunately. Before that i had the same issue with the driver supplied by Windows Update and the one pulled from Lenovo. I can reproduce the problem on another, similar Laptop.

If I switch of the Skylight, the glitches become even more pronounced:

I’ll use CPU rendering for now…if the problem resolves by itself, i’ll let you know.

I just realized I have access to a laptop with a GPU that is from the same architecture generation, namely an Radeon 860M (on an AMD RYZEN AI 9 HX).

I see similar artifacts as you. We use the laptop to work together with AMD to figure out what the issues are. We have currently exhausted on our end our venues and have communicated to AMD our findings. Hopefully they are able to shed more light on the issue and give us a fix, or at least enough information that allows us to create a fix.

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I have logged the issue as RH-85600 Rendering artifacts on rdna3 GPU hardware