Exported images with transparency problem

[Chtenelis]

I render my images with nothing in the background so I can put whatever I want afterwards in photoshop. I use depth of field so my model gets blurred. This blue background in the arnold renderview is just a color I choose in the arnold renderview settings. I put the same color in photoshop and this dark outline appears. I tried almost every image type.
Is there a way to fix this?

[hyperviktor · Accepted solution]

Maybe try Nuke instead photoshop ?

[Chtenelis]

I will try nuke in the future. Thanks for the answer!

[hyperviktor]

You will definitely be able to sort this with a few clicks in Nuke, I have no clue how it would work in photoshop 🙂

[CiroCardoso3v]

In Nuke you need to premultiply and in Photoshop the best option you have is to render the image with background as black so it doesn't show. Otherwise you will always have that edge. Which can also be removed in Photoshop using the menu Layer - Matting.

[Chtenelis]

In nuke when i uncheck premultiply it improves a lot but still is not perfect.

[hyperviktor]

Try using black in arnold BG instead of any color, if needed use a blue light instead of the BG for a subtle tint.

In nuke try using the unpremult node instead of the checkbox, you will have more options.