Only empty or black render results.
schlumpenhuber
Posts: 53
I'm not sure what I've done, but for hours now I've only been getting blank or completely black renders (graphics card AND/OR CPU), no matter how often I reset the render settings or try to fix them using supposed solutions from online tutorials.
Is there any way to effectively reset this without having to reinstall the entire software?
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If you look at Render Settings > Hardware what is then ticked?
If you look in your log Help > Troubleshooting > View Log what does it say when you try to render.
In Render Settings on top, there is a 'Default' button. I would assume it set render settings to default, but don't know.
My RTX 4070 Ti Super is selected as the hardware, but I've also tried it with the CPU and both, and I've pressed the default button several times.
The log file shows the following for a single render attempt:
2026-01-02 19:35:44.141 [INFO] :: Rendering image...
2026-01-02 19:35:45.392 Iray [INFO] - TRAV:DATABASE :: 1.0 TRAV db progr: Traversing scene.
2026-01-02 19:35:45.884 Iray [INFO] - TRAV:DATABASE :: 1.0 TRAV db info : Traversing scene took 492.069 ms.
2026-01-02 19:35:45.919 Iray (Scene Traversal) : Initializing update
2026-01-02 19:35:45.920 Iray (Scene Traversal) : Retrieving journal and checking for changes
2026-01-02 19:35:45.920 Iray (Scene Update) : Updating LPE labels
2026-01-02 19:35:45.920 Iray (Scene Update) : Updating geometry contexts
2026-01-02 19:35:45.921 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating geometry contexts.
2026-01-02 19:35:45.921 Iray (Scene Update) : Updating geometry
2026-01-02 19:35:45.921 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating geometry.
2026-01-02 19:35:45.921 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Importing scene graph.
2026-01-02 19:35:46.006 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Auto instancing compression 1.0x (Full instancing compression 1.0x)
2026-01-02 19:35:46.007 Iray (Scene Update) : Retrieving geometry
2026-01-02 19:35:46.007 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Importing geometry for motion time 0
2026-01-02 19:35:46.081 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Geometry import (2 triangle objects with 1 M triangles, 2 instances yielding 1 M triangles) took 74.472 ms
2026-01-02 19:35:46.082 Iray (Scene Update) : Updating motion transform data
2026-01-02 19:35:46.082 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating motion transforms.
2026-01-02 19:35:46.082 Iray (Scene Update) : Updating section objects
2026-01-02 19:35:46.082 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating section objects.
2026-01-02 19:35:46.082 Iray (Scene Update) : Updating materials
2026-01-02 19:35:46.082 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating materials.
2026-01-02 19:35:46.135 Iray [INFO] - MATCNV:RENDER :: 1.0 MATCNV rend info : found 1125 textures, 0 lambdas (0 unique)
2026-01-02 19:35:46.135 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Emitter geometry import (18 light sources with 7233 triangles, 1 instance) took 373.300 us
2026-01-02 19:35:46.148 Iray (Scene Update) : Updating environment
2026-01-02 19:35:46.148 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating environment.
2026-01-02 19:35:46.152 Iray (Scene Update) : Updating code
2026-01-02 19:35:46.152 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating compiled material code.
2026-01-02 19:35:46.152 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating compiled environment code.
2026-01-02 19:35:46.153 Iray (Scene Update) : Updating textures
2026-01-02 19:35:46.153 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating material textures.
2026-01-02 19:35:46.188 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating environment textures.
2026-01-02 19:35:46.188 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating BSDFs.
2026-01-02 19:35:46.188 Iray (Scene Update) : Updating volumes
2026-01-02 19:35:46.188 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating volumes.
2026-01-02 19:35:46.189 Iray (Scene Update) : Updating lens data
2026-01-02 19:35:46.189 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating lens.
2026-01-02 19:35:46.189 Iray (Scene Update) : Updating lights
2026-01-02 19:35:46.189 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating lights.
2026-01-02 19:35:46.190 Iray (Scene Update) : Updating instance topology
2026-01-02 19:35:46.190 Iray (Scene Update) : Updating flags
2026-01-02 19:35:46.190 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating object flags.
2026-01-02 19:35:46.191 Iray (Scene Update) : Updating backplate
2026-01-02 19:35:46.192 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating backplate.
2026-01-02 19:35:46.192 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating compiled backplate code.
2026-01-02 19:35:46.192 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating backplate textures.
2026-01-02 19:35:46.192 Iray (Scene Update) : Updating decals
2026-01-02 19:35:46.192 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Updating decals.
2026-01-02 19:35:46.198 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Using iray core convergence estimate.
2026-01-02 19:35:46.199 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Allocating 1-layer frame buffer
2026-01-02 19:35:46.205 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Using batch scheduling, caustic sampler disabled
2026-01-02 19:35:46.205 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Initializing local rendering.
2026-01-02 19:35:46.205 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Available GPU memory has increased since out-of-memory failure. Re-enabling CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER)
2026-01-02 19:35:46.209 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Initializing OptiX for CUDA device 0
2026-01-02 19:35:46.576 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Rendering with 1 device(s):
2026-01-02 19:35:46.576 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER)
2026-01-02 19:35:46.576 Iray [INFO] - IRAY:RENDER :: 1.0 IRAY rend info : Rendering...
2026-01-02 19:35:46.576 Iray [INFO] - IRAY:RENDER :: 1.13 IRAY rend progr: CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER): Processing scene...
2026-01-02 19:35:46.577 Iray (Scene Access) : Retrieving geometry
2026-01-02 19:35:46.577 Iray (Scene Access) : Retrieving device geometry
2026-01-02 19:35:46.769 Iray (Scene Access) : Retrieving volumes
2026-01-02 19:35:46.770 Iray (Scene Access) : Retrieving textures
2026-01-02 19:35:46.776 Iray (Scene Access) : Retrieving device textures
2026-01-02 19:35:50.504 Iray (Scene Access) : Retrieving flags
2026-01-02 19:35:50.504 Iray (Scene Access) : Retrieving device flags
2026-01-02 19:35:50.506 Iray (Scene Access) : Retrieving lights
2026-01-02 19:35:50.506 Iray [INFO] - IRAY:RENDER :: 1.9 IRAY rend info : Importing lights for motion time 0
2026-01-02 19:35:50.506 Iray [INFO] - IRAY:RENDER :: 1.9 IRAY rend info : Initializing light hierarchy.
2026-01-02 19:35:50.601 Iray [INFO] - IRAY:RENDER :: 1.9 IRAY rend info : Light hierarchy initialization took 94.884 ms
2026-01-02 19:35:50.602 Iray (Scene Access) : Retrieving device lights
2026-01-02 19:35:50.602 Iray (Scene Access) : Retrieving section objects
2026-01-02 19:35:50.602 Iray (Scene Access) : Retrieving device section objects
2026-01-02 19:35:50.603 Iray (Scene Access) : Retrieving materials
2026-01-02 19:35:50.612 Iray (Scene Access) : Compiling custom code
2026-01-02 19:35:50.612 Iray (Scene Access) : Retrieving environment
2026-01-02 19:35:50.620 Iray (Scene Access) : Retrieving device environment
2026-01-02 19:35:50.624 Iray (Scene Access) : Retrieving backplate
2026-01-02 19:35:50.624 Iray (Scene Access) : Retrieving device backplate
2026-01-02 19:35:50.624 Iray (Scene Access) : Retrieving decals
2026-01-02 19:35:50.624 Iray (Scene Access) : Retrieving device decals
2026-01-02 19:35:50.625 Iray (Scene Access) : Retrieving motion transform data
2026-01-02 19:35:50.625 Iray (Scene Access) : Retrieving device motion transform data
2026-01-02 19:35:50.625 Iray (Scene Access) : Retrieving lens data
2026-01-02 19:35:50.625 Iray (Scene Access) : Retrieving device lens data
2026-01-02 19:35:50.655 Iray [INFO] - IRAY:RENDER :: 1.9 IRAY rend info : JIT-linking wavefront kernel in 23.545 ms
2026-01-02 19:35:50.669 Iray [INFO] - IRAY:RENDER :: 1.13 IRAY rend info : CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER): Scene processed in 4.093s
2026-01-02 19:35:50.670 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IRAY:RENDER :: 1.13 IRAY rend error: CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER): Not enough memory for kernel launches (700.850 MiB (out of 700.850 MiB total) still required, 0 B available). Cannot allocate framebuffer.
2026-01-02 19:35:50.670 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IRAY:RENDER :: 1.13 IRAY rend error: CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER): Failed to setup device frame buffer
2026-01-02 19:35:50.671 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IRAY:RENDER :: 1.13 IRAY rend error: CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER): Device failed while rendering
2026-01-02 19:35:50.671 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [WARNING] - IRAY:RENDER :: 1.13 IRAY rend warn : CUDA device 0 (NVIDIA GeForce RTX 4070 Ti SUPER) ran out of memory and is temporarily unavailable for rendering.
2026-01-02 19:35:51.155 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [WARNING] - IRAY:RENDER :: 1.13 IRAY rend warn : All available GPUs failed.
2026-01-02 19:35:51.156 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IRAY:RENDER :: 1.13 IRAY rend error: Fallback to CPU not allowed.
2026-01-02 19:35:51.156 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IRAY:RENDER :: 1.13 IRAY rend error: All workers failed: aborting render
2026-01-02 19:35:51.156 [ERROR] Iray :: Internal rendering error.
2026-01-02 19:35:51.336 [INFO] :: Saved image: C:\Users\Ingo\AppData\Roaming\DAZ 3D\Studio4\temp\render\r.png
2026-01-02 19:35:51.337 [INFO] :: Finished rendering.
2026-01-02 19:35:51.429 [INFO] :: Total Rendering Time: 7.39 seconds
I forgot to mention (in case this is relevant):
The DAZ Studio version currently in use is 4.24.0.3
The log states that you have run out of VRAM and CPU fallback is disabled - double-check that you have not accidentally blocked the CPU fallback.
Also, I am not an expert but 2 instances of 1 million triangles sounds like a lot so make sure nothing in the scene has an unusally high SubD?
16 GB of VRAM isn't enough? Wow!
Indeed, CPU fallback is disabled (though I've apparently always managed without it, even in more complex scenes, as this error only occurred today).
What's interesting is that I'm not trying to render a complex scene, but just a single product:
- NEOFF Artemis-13 TLT Medical Transport (https://www.daz3d.com/neoff-artemis-13-tlt-medical-transport-poses-and-camera-anchor), just the Module without any extras, characters, background, etc
There must be something wrong with the product. I'll enable fallback as a precaution and try rendering a different object, because for the past few hours I've been foolishly trying to render only this one product (without a control product).
Update:
The file in question still isn't rendering... Something seems to be seriously wrong with the product itself.
Other things are rendering, but now I'm experiencing a new phenomenon (presumably due to all this messing around).
If I use the Spot Render Tool, everything renders as usual.
But if I use the Render button, a tiny thumbnail is rendered. What could I have changed to cause this result? Any ideas? I'm getting a bit frustrated...
16GB should be enough to render that out on it's own but unfortunately I don't have the product myself to check. Do you own iray-memory-assistant, scene-analyzer-organizer-simplifier or scene-optimizer? Those will give you a quick overview of the subd settings (or estimated faces in the case of scene optimiser) so you can see what in the scene is perhaps causing the issue. Each increment of SubD multiplies the geometry and so it can balloon out of control real fast. It could be that the product was released with a very high value by mistake?
What is the Pixel Size listed under the General section of the Render Settings tab? Has that accidentally been changed to 64x64 or something?
I actually just bought the scene optimizer, but I haven't used it yet.
It's certainly a good approach that I'll try out, so thanks a lot for your help.
Any further thoughts on the postage-stamp-sized render image described in the last post?
I’ll check this in a moment...
That was it!
Thank you so much for your help!
No problem, glad to help :)
Also, Scene Optimiser does list SubD of all objects in the scene - it's under the "Mesh Resolutions" tab at the top that I have never noticed before - another reason it's good to help others as it also helps me learn more myself :P