I have looked through various threads on this and it does not seem to be a common issue. Basically, I’m cutting assets out of images using the images as planes addon and shift K. I separate the shards into their own objects. and then I figured that I’d add geometry around it. Unfortunately it looks like there’s a serious limitation that occurs when ever I add any mesh to one of the separated shards of a plane. it causes that object to fight with any other object over whats being rendered on top. blender 3.3 lts.
I was able to recreate the problem with a public domain image of a lion.
If you have faces very close to each other, you’ll often get what is called “Z-fighting”. It stems from the zbuffer, which keeps track of depth. If two pixels are the same or very similar distance from the camera, the software can’t determine which should get precedence because it is ambiguous, and you get a flickering sort of effect when bits of one polygon fight with bits of another. Co-planar faces will do this for certain.
Move your objects just a little bit apart so they don’t overlap.
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The zfighting happens no matter what distance I place the objects from each other. Again, it only happens when I add geometry to an object yielded from a separation by selection.
Could you have extraneous geometry there, doubling faces accidentally?
If you share the file, we can have a look.
23 01 27 spanish lion.blend (833.1 KB)
here is that spanish lion example.
I couldn’t see anything wrong because the texture wasn’t packed, but I found a copy on Flickr. Ah, that’s not Z-fighting. That’s the Blend Mode in the Shader Editor. Here:
Your file has Alpha Blend; switch it to Opaque.
There’s also something weird with your separated lion, it seems you took a bit of plane with you when you separated it, but you can probably figure it out (or maybe I just don’t understand the scene). Anyway, that change should make it look normal.
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