Author Topic: 01.2022 compositing issues  (Read 10712 times)

2022-01-31, 20:38:48
Reply #30

piotrus3333

  • Active Users
  • **
  • Posts: 230
    • View Profile

Oh. You mean to just Image>Mode>32 bit.
Interestingly, it does seem to improve, but it's very subtle.

Regarding that option with gamma in PS, I never used that or new it existed.

if you need it cleaner just use exrs. these would look perfect even in Photoshop.
Marcin Piotrowski
youtube

2022-01-31, 20:45:13
Reply #31

lupaz

  • Active Users
  • **
  • Posts: 951
    • View Profile
Thanks Piotrus.
I'll try. It scares me the disc space, but will definitely give it a try.
Fusion sounds good too and always wanted to play with it.

2022-01-31, 21:37:52
Reply #32

piotrus3333

  • Active Users
  • **
  • Posts: 230
    • View Profile
16bit exr should be smaller than your 16bit PNG. no need for 32bit.
Marcin Piotrowski
youtube

2022-05-22, 23:25:58
Reply #33

lupaz

  • Active Users
  • **
  • Posts: 951
    • View Profile
I'll try with fusion later. But yes. With photoshop this is the result:

See below please.
I have two tall boxes. One with physical material and the other with legacy, to discard reflections.
Rendered against an empty background.

I save the image as PNG with alpha included.

In photoshop I add a white background and I can see a darker grey contour.

Edit: I added the Max file

Here are my results from Photoshop (dark border) and Fusion (no border).

Thank you Maru. I just did this with Fusion. Now my question is, can Corona render in the VFB directly with the transparency instead of using a black background, like Fusion does? We would save directly into a PNG for example, saving us the fusion step.

2022-05-23, 09:11:15
Reply #34

piotrus3333

  • Active Users
  • **
  • Posts: 230
    • View Profile
its not Corona. this is PS trying to do compositing in 2.2
Marcin Piotrowski
youtube

2022-05-23, 14:32:32
Reply #35

lupaz

  • Active Users
  • **
  • Posts: 951
    • View Profile
I understand. But if Fusion let's you output/save the image with a transparent background, maybe corona can do it too.
In that case you can save as PNG and open it in PS with perfect transparency.

2022-05-23, 15:34:52
Reply #36

TomG

  • Administrator
  • Active Users
  • *****
  • Posts: 5434
    • View Profile
The PNG options from Max when saving specify whether to include the alpha or not. As a note, Photoshop may not show it on loading because Photoshop, but it is there.
Tom Grimes | chaos-corona.com
Product Manager | contact us

2022-05-23, 16:54:52
Reply #37

lupaz

  • Active Users
  • **
  • Posts: 951
    • View Profile
The PNG options from Max when saving specify whether to include the alpha or not. As a note, Photoshop may not show it on loading because Photoshop, but it is there.

Ok. So it wouldn't be possible to show it like this in the VFB?
See attached please.
I feel (really don't know), that if it's shown like this in the VFB, as opposed to a black background, it wouldn't bring black pixels around the image into photoshop. No?

2022-05-23, 16:59:32
Reply #38

TomG

  • Administrator
  • Active Users
  • *****
  • Posts: 5434
    • View Profile
The VFB will always show whatever background color or image is set for the scene, but those areas will also generate an alpha mask that gets saved with the image. Photoshop gets a bit weird about this and may load the PNG with the background visible, but the alpha is in there and can be extracted and applied, I don't remember exactly when it decides to get weirded out about it :)

A quick test with a cube shows that so long as Alpha channel is checked in the Max settings, it loaded just fine in PS with that already applied for me.
Tom Grimes | chaos-corona.com
Product Manager | contact us

2022-05-23, 17:07:21
Reply #39

lupaz

  • Active Users
  • **
  • Posts: 951
    • View Profile
The VFB will always show whatever background color or image is set for the scene, but those areas will also generate an alpha mask that gets saved with the image. Photoshop gets a bit weird about this and may load the PNG with the background visible, but the alpha is in there and can be extracted and applied, I don't remember exactly when it decides to get weirded out about it :)

A quick test with a cube shows that so long as Alpha channel is checked in the Max settings, it loaded just fine in PS with that already applied for me.

Ah ok. Thanks.

2022-05-27, 10:42:16
Reply #40

piotrus3333

  • Active Users
  • **
  • Posts: 230
    • View Profile
This is how Fusion handles alpha edges issues with Merge node (Additive/Subtractive slider):

Marcin Piotrowski
youtube