Author Topic: How to avoid white border in Corona Renderer?  (Read 571 times)

2022-06-11, 11:56:00

Schlee

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Hi all

I do get at Corona Renderer when using alpha channel (PNG) a white border after rendering.

I did watch some videos which mentioned in the render setting to select "direct visibility override".... but it doesn't help.

Any ideas?

Many thanks

Mike

2022-06-11, 17:45:36
Reply #1

aler

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Any ideas?
If this static, then Photoshop has this technique:
Ctrl+click by layer > Invert selection - Ctrl+Shift+I > press 2-3 times Del.

2022-06-12, 01:23:38
Reply #2

burnin

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Straight Alpha... ?

2022-06-13, 01:50:33
Reply #3

Schlee

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Hi and Thanks

@aler, this is a solution, but it looks after that it looks very pixelated.

@burnin, I have selected "Straight Alpha" in the render setting now, but I still see the white border. Do I have to consider something else?

Is there not a out of the box solution for this problem in Corona renderer?

many thanks

Mike

2022-06-13, 10:08:00
Reply #4

ficdogg

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It's not a corona thing, its a C4D thing, saving out transparent PNGs out of the picture viewer is a very hit and miss thing. Just add the alpha as a render layer and then make it transparent in post.

2022-06-13, 13:20:12
Reply #5

burnin

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Upscale/downscale, super-sample, feather...  Such is nature of alphas, filters, samplers, tone mappings, passes and apps one uses to compose perfection in detail.
Have you looked into cryptomatte pipeline to ease the pain?

2022-06-13, 13:45:37
Reply #6

Schlee

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Thanks!

@ficdogg, Is there a tutorial how to do so?

Many thanks

Mike

2022-06-14, 11:43:59
Reply #7

Beanzvision

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2022-06-14, 21:54:44
Reply #8

piotrus3333

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