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Why do I have a large white artefact on the rendered image?

How to properly denoise renderings?Why does an object with a glossy shader render in black?Blender render crash when using subsurf modifiers.Why are my videos rendering in black and white?Blender rendered image blackRendered image only black and white noiseWhy don't the freestyle lines show in the rendered image?Cycles image renders in black and whiteRendered image has black outlines from imported imageSome textures appearing white when rendered?Rendered animation is all whiteWhy is my animation render all white?Why does my scene lose color when i zoom in rendered viewport?

5

1

$begingroup$

Cant figure out why the rendered image has a large black and white artifact (on the bottle on the right)?

This is the blender file.

Appreciate any tips!

rendering

share|improve this question

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  it doesn't happen when I open your file in 2.79 or 2.8
  $endgroup$
  – moonboots
  11 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Possible duplicate of How to properly denoise renderings?
  $endgroup$
  – Duarte Farrajota Ramos
  8 hours ago
  

  
  
  
  

add a comment | 

5

1

$begingroup$

Cant figure out why the rendered image has a large black and white artifact (on the bottle on the right)?

This is the blender file.

Appreciate any tips!

rendering

share|improve this question

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  it doesn't happen when I open your file in 2.79 or 2.8
  $endgroup$
  – moonboots
  11 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Possible duplicate of How to properly denoise renderings?
  $endgroup$
  – Duarte Farrajota Ramos
  8 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

Cant figure out why the rendered image has a large black and white artifact (on the bottle on the right)?

This is the blender file.

Appreciate any tips!

rendering

share|improve this question

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 7 hours ago

cegaton

64.6k10125279

edited 7 hours ago

cegaton

64.6k10125279

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

New contributor

Sophia Malakhova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 12 hours ago

Sophia MalakhovaSophia Malakhova

262

1 Answer
1

active

oldest

votes

12

$begingroup$

That big error on the top is caused mostly by fireflies and the denoiser.

The denoiser has a hard time with small bright elements surrounded by darker pixels.

Just for comparison here's the image with no denoising:

See:
How to properly denoise renderings?

What is the solution?

You need more samples and less aggressive settings for the denoiser

Or get you can get rid of the denoiser completely and use some clamp indirect to control the fireflies.

But you can also avoid those hot spots and fireflies if you change the lighting on the scene.

Don't use point lights to light shiny and transparent objects...

They will be reflected as bright shiny points and are more likely to cause fireflies.

If you use large area lights fireflies are less of a problem. Here's the same scene at 600 samples, no denoising and no clamp indirect.

read:

https://blender.stackexchange.com/a/50576/1853

Other advise. Try to avoid high levels of subdivision (like you have in the plane used in the background). you are generating a very large number of unnecessary vertices by setting the subdivision to 6. Very rarely you would need more than 3.

Read: Blender render crash when using subsurf modifiers.

Last piece of advise: Try to make your objects to the size they would be in the real world. Your bottles are larger than a house at 9m tall. It makes a difference in terms of the size and intensity of the lights (and if you are going to do any kind of physics or fluid simulation), and also in terms of the depth of field on the camera.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

cegatoncegaton

64.6k10125279

$endgroup$

add a comment | 

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12

$begingroup$

That big error on the top is caused mostly by fireflies and the denoiser.

The denoiser has a hard time with small bright elements surrounded by darker pixels.

Just for comparison here's the image with no denoising:

See:
How to properly denoise renderings?

What is the solution?

You need more samples and less aggressive settings for the denoiser

Or get you can get rid of the denoiser completely and use some clamp indirect to control the fireflies.

But you can also avoid those hot spots and fireflies if you change the lighting on the scene.

Don't use point lights to light shiny and transparent objects...

They will be reflected as bright shiny points and are more likely to cause fireflies.

If you use large area lights fireflies are less of a problem. Here's the same scene at 600 samples, no denoising and no clamp indirect.

read:

https://blender.stackexchange.com/a/50576/1853

Other advise. Try to avoid high levels of subdivision (like you have in the plane used in the background). you are generating a very large number of unnecessary vertices by setting the subdivision to 6. Very rarely you would need more than 3.

Read: Blender render crash when using subsurf modifiers.

Last piece of advise: Try to make your objects to the size they would be in the real world. Your bottles are larger than a house at 9m tall. It makes a difference in terms of the size and intensity of the lights (and if you are going to do any kind of physics or fluid simulation), and also in terms of the depth of field on the camera.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

cegatoncegaton

64.6k10125279

$endgroup$

add a comment | 

12

$begingroup$

That big error on the top is caused mostly by fireflies and the denoiser.

The denoiser has a hard time with small bright elements surrounded by darker pixels.

Just for comparison here's the image with no denoising:

See:
How to properly denoise renderings?

What is the solution?

You need more samples and less aggressive settings for the denoiser

Or get you can get rid of the denoiser completely and use some clamp indirect to control the fireflies.

But you can also avoid those hot spots and fireflies if you change the lighting on the scene.

Don't use point lights to light shiny and transparent objects...

They will be reflected as bright shiny points and are more likely to cause fireflies.

If you use large area lights fireflies are less of a problem. Here's the same scene at 600 samples, no denoising and no clamp indirect.

read:

https://blender.stackexchange.com/a/50576/1853

Other advise. Try to avoid high levels of subdivision (like you have in the plane used in the background). you are generating a very large number of unnecessary vertices by setting the subdivision to 6. Very rarely you would need more than 3.

Read: Blender render crash when using subsurf modifiers.

Last piece of advise: Try to make your objects to the size they would be in the real world. Your bottles are larger than a house at 9m tall. It makes a difference in terms of the size and intensity of the lights (and if you are going to do any kind of physics or fluid simulation), and also in terms of the depth of field on the camera.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

cegatoncegaton

64.6k10125279

$endgroup$

add a comment | 

$begingroup$

That big error on the top is caused mostly by fireflies and the denoiser.

The denoiser has a hard time with small bright elements surrounded by darker pixels.

Just for comparison here's the image with no denoising:

See:
How to properly denoise renderings?

What is the solution?

You need more samples and less aggressive settings for the denoiser

Or get you can get rid of the denoiser completely and use some clamp indirect to control the fireflies.

But you can also avoid those hot spots and fireflies if you change the lighting on the scene.

Don't use point lights to light shiny and transparent objects...

They will be reflected as bright shiny points and are more likely to cause fireflies.

If you use large area lights fireflies are less of a problem. Here's the same scene at 600 samples, no denoising and no clamp indirect.

read:

https://blender.stackexchange.com/a/50576/1853

Other advise. Try to avoid high levels of subdivision (like you have in the plane used in the background). you are generating a very large number of unnecessary vertices by setting the subdivision to 6. Very rarely you would need more than 3.

Read: Blender render crash when using subsurf modifiers.

Last piece of advise: Try to make your objects to the size they would be in the real world. Your bottles are larger than a house at 9m tall. It makes a difference in terms of the size and intensity of the lights (and if you are going to do any kind of physics or fluid simulation), and also in terms of the depth of field on the camera.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

cegatoncegaton

64.6k10125279

$endgroup$

share|improve this answer

edited 6 hours ago

answered 8 hours ago

cegatoncegaton

64.6k10125279

answered 8 hours ago

cegatoncegaton

64.6k10125279

answered 8 hours ago

cegatoncegaton

64.6k10125279