Blackmagic Forum

Hi there,

I'm looking for help fixing these dead pixels, let me describe the problem in a bit more detaill:

I’m encountering an issue with renders specifically when utilizing render passes. Randomly, a dead black pixel appears in my renders. This poses a significant problem, as when I apply the blur node during compositing, this hole becomes excessively large. This issue has recurred across multiple rendering attempts.

When viewing just the beauty pass, there are no discernible holes; they only manifest when attempting to reconstruct the beauty from the render passes.

The render exhibits a hole as depicted here:
https://blenderartists.org/uploads/default/original/4X/2/a/f/2af637de6e8650549d2c627c6390ee6b44e1e810.jpeg

Utilizing the blur node in compositing results in the entire hole being enlarged, as illustrated here:
https://blenderartists.org/uploads/default/original/4X/8/b/2/8b2898ce8935ad5b9762cb4c1f5415eb8c7c933d.jpeg

Meanwhile, the normal beauty render appears unaffected, shown here:
https://blenderartists.org/uploads/default/original/4X/f/c/a/fca2e2a3a7a3111742be50a0995926ea1bd85215.jpeg

The hole is only present in the GlossDirect and DiffuseDirect passes; other passes remain unaffected.

What makes it even more strange is that these ‘holes’ are only on certain frames. It’s not consistent throughout the render.

Is there a node/tool that could fill in these render errors?

Okay, so plot twist, the hole only appears in Fusion. When I view the EXR through DJV the hole is not present. Anyone know what is going on? Very strange.

Images shows Fusion and DJV lined up:

Also checked the frame in Photoshop, no hole to be seen. The problem really is with Fusion

I tried updating to the latest nvidia drivers and latest version of fusion, but the problem did not go away.

This will be of no help or comfort to you whatsoever but you have just discovered something that would make a great headline in a science journal, 'Fusion Creates A Black Hole'.

Ok, so went on a bit of button bashing.. and on the loader node changing the Process mode from Full Frame to PAL/HD Fields removes the dead pixel for me. Why? I'm not too sure

This feels like an out of range display thing to me. What happens if you check 'clip white' in a brightness/contrast tool and bring down the high slider?

Check this topic on WSL too if you want to do a little deep dive:

https://www.steakunderwater.com/wesuckl ... php?t=3902

Ryan Hays wrote:This feels like an out of range display thing to me. What happens if you check 'clip white' in a brightness/contrast tool and bring down the high slider?

Tried but it did not do much. Pixel remained their and perfectly black

Pieter Van Houte wrote:Check this topic on WSL too if you want to do a little deep dive:

https://www.steakunderwater.com/wesuckl ... php?t=3902

Thanks.. This is interesting!