Hi there, just updated to Blender 4.0.2 from 3.4.1, and noticed that in the render window some strange white lines appear just in the highlights. Once I save the image, the lines disappear, so is not a great deal, but it seems quite strange and interrupts my workflow a little bit. Also depending on the zoom level the lines change a little bit.
Never happened with the previous versions and I’m not able to figure it out. Anyone had a similar experience? Any idea how to solve it?
I’m working in a Mac with Intel, rendering with Cycles (below are attached more details and some screenshots of the renders with and whitout the lines, also a link to a short video showing the zoom variation).
Hi there, here is another video of an example of the white lines but in the render preview of the viewport. As you can see makes quite difficult to preview the image… once rendered the lines are gone, but often I have to do several renders to achieve the result I want. This Blender 4 update has become a nighmare for me, because apart from this, a lot of textures look awful and I have to tweak them a lot, and the files become kind of corrupt in the sense that I’m not longer able to open them in the previous version of Blender. I wish I had’nt update, I hope they fix this in the next update.
Nobody has experienced something like this? Thanks
Hi again, I just thought it’s a way this new version of Blender tells certain parts of the image are overexposed. If a go with a much softer lighting the lines doesn’t appear. It can be a cool option but I don’t need it (actually it bothers me quite a bit), it would be really cool to be able to opt out this feature. If I find it I will post it in case anyone can find it useful.
I haven’t seen anything like that on my end, so I would think it’s a bug, probably related to your system. I’m not on Mac, so I can’t test this, but I don’t get this problem on Windows.
I’ve seen that kind of pattern on low quality JPG’s and MP4 videos. It’s a result from H264 compression, most of social media has those. If I had to guess, there must be emission shaders or “HDRI” with high values using a compressed image. I would review texture quality in that case. Denoiser may be softening those pixels on your saved files.
I think you’re right, this has to be some kind of bug. I tried to recreate this problem with a new project and I couldn’t… I think only happens in the projects I started with older versions of Blender. Hope they fix this, maybe if I append everything in a new project this won’t happen, I’ll make some tests once I have time, maybe updating to some beta version would fix it. Thanks!!
I thought that would be the case, but the lines aren’t fixed to any particular position as I show in the first video, so I think it can be a bug. The first image uses Sky texture, and the other ones use HDRI from Polyhaven that worked fine in the previous versions of Blender. Also it just happens in the highlights. I made some tests trying to recreate the problem comparing the Filmic with False color to see the correlation between these two, but nothing happened… Maybe only affects the projects started with older Blender, I will try to update onece I finish this project I’m working on… Thanks!
