Hi! I have an issue with some big models. When I enable the patch tracing, all the screen goes black, and the images and panoramas I have saved, are black when I export them. Somo of my scenes has several models exported, and some times this is fixed by disabling any os these models, but still don't know how to solve it
My pc build is: i9-11900K, RTX 3090 and 64gb RAM 3666mhz. I don't know if might be a hardware issue.
Hello ,
Your hardware is more than capable of using Path Tracer, so I don't believe this should be causing issues, but to be sure, it might be worth checking to see if you need to update your drivers, particularly for your GPU.
If the drivers are not the cause of the issue, then please submit a Bug Report and share your Twinmotion file with our support team so we can figure out what might be going wrong.
Best,
Raghib
Hi, I cannot share my projects since they are confidential due to my company. Is there any othe option to get some support??
It seems like path tracing goes black when there is a large amount of polygons on the scene. For example, I have 5 models inside the scene, if I hide one or two, whatever they are, it works fine. But when all of them are enabled, path tracing goes black.
Regards
It seems to be an object count issue. Having the same models, if I collapse them by material or family (from revit), there is no problem with path tracing, but the scene is not as editable as keeping hierarchy.
That's great! I hope this could be resolved soon.
Could you tell me the number of objects in which path tracing goes black??
Regards,
Any update about this??
Hello, I have experienced the same situation this weeked. I had a large model and had completed preparing it for export. When the black screen appeared in ray-tracing, we selected the model and saved it as an object in our library. We then switched off the original one and placed our ''library object'' in its place. It rendered fine after this. The only draw-back is the editing is limited after this process.
Hello, I used the Revit example file "Snowden Towers" and added more lights. When I do this, the whole scene doesn't turn black but the lights themselves emit black circles as if it was voiding the light around it rather than emitting it. Would this be the same issue with scene complexity and rendering capabilities? Setup: i7 9700k, RTX 2080 Super and 32gb RAM. It also keeps crashing with kernel power issue in twinmotion crash popup occasionally after enabling pathtracing. Thanks
Thanks for that info.
I was able to find that this is a very recently reported bug that is currently being investigated. We're still early into the investigation, so I don't have any solutions to share at this time, but one partial workaround that seems to prevent the viewport from going black is to reduce the Effects Quality setting to Medium. This won't provide a complete workaround, as exported media will still appear black.
I will share your findings with the team, and hopefully that helps them resolve the issue sooner. If we discover a workaround that can help avoid the issue until a fix is released in a future update, I will let you know.
Best,
Raghib
Unfortunately, we haven't yet determined around how many objects in the scene cause the Path Tracer to go black. It also seems like it may be different for different hardware configurations, so I can't say anything for certain.
If we find more information, I will let you know.
Best,
Raghib
Hi,
Sorry for the delay in getting back to you on this. After some additional testing, we recently determined that this seems to occur due to GPU limitations when the scene being rendered is very complex, so unfortunately its not something we can really fix, Path Tracer become unable to render the scene. This behavior differs on a per GPU basis and is more a result of overall scene complexity, rather than object count alone, so we can't provide an accurate estimate of how heavy a load on your GPU is needed before this starts to occur.
Some workarounds we found for this are to lower Quality settings, and for media it's best to hide any objects in the scene graph that aren't going to be visible in the image/video to reduce GPU load during rendering. Hiding objects in media lets you maintain higher quality settings and you can avoid having to completely remove objects from your scene.
I hope that helps.
Best,
Raghib
Hi,
This has just happened to me after I added a set of glasses to my scene and added glass material to it. The path tracing mode were just black, before the sample goal is reached.
However, after I imported the .fbx format instead of .obj format the problem didn’t occur and the path tracing is just working fine. So I think, in my case at least, it is a problem caused by the .obj format
