Transpared image rendered in Eevee when its saved its all white #95066

New Issue

Slobodan · 2022-01-19T20:24:48+01:00

Slobodan commented

2022-01-19 20:24:48 +01:00

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: AMD Radeon HD 5570 ATI Technologies Inc. 4.5.13399 Core Profile Context 15.200.1062.1004

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-18 22:23, hash: 2e5aecf557
Worked: (newest version of Blender that worked as expected)

Short description of error

I guys, I have my "volumetrics" scene in blender 3.0 and when I render image with transparent background in Eevee render engine in viewport it has "check board" shown but when I save image from render screen its all white. I have set in render properties under "Film" to transparent I have set color "RGBA" and File format to PNG under Properties. What Im doing wrong ?

Edit: When I uncheck transparent under film I getting correct imaga with black background

Exact steps for others to reproduce the error
First Bake than save image from render screen to pc,white_and_blue_ball_blender_3.blend, Im getting white image
[Based on the default startup or an attached .blend file (as simple as possible)]

**System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: AMD Radeon HD 5570 ATI Technologies Inc. 4.5.13399 Core Profile Context 15.200.1062.1004 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-18 22:23, hash: `2e5aecf557` Worked: (newest version of Blender that worked as expected) **Short description of error** I guys, I have my "volumetrics" scene in blender 3.0 and when I render image with transparent background in Eevee render engine in viewport it has "check board" shown but when I save image from render screen its all white. I have set in render properties under "Film" to transparent I have set color "RGBA" and File format to PNG under Properties. What Im doing wrong ? Edit: When I uncheck transparent under film I getting correct imaga with black background **Exact steps for others to reproduce the error** First Bake than save image from render screen to pc,[white_and_blue_ball_blender_3.blend](https://archive.blender.org/developer/F12811821/white_and_blue_ball_blender_3.blend), Im getting white image [Based on the default startup or an attached .blend file (as simple as possible)]

Slobodan commented

2022-01-19 20:24:48 +01:00

Added subscriber: @Vido

Slobodan changed title from ~~Rendered image from Eevee when saved it all white~~ to Transpared image rendered in Eevee when its saved its all white

2022-01-19 20:33:45 +01:00

Germano Cavalcante commented

2022-01-20 16:18:07 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-01-20 16:18:07 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2022-01-20 16:18:07 +01:00

The bake is taking a lot of time for me.
I see you are using composition. Have you tried connecting the Alpha spot?

The bake is taking a lot of time for me. I see you are using composition. Have you tried connecting the Alpha spot? ![Captura de Tela 2022-01-20 às 12.15.07.png](https://archive.blender.org/developer/F12812800/Captura_de_Tela_2022-01-20_a_s_12.15.07.png)

Slobodan commented

2022-01-20 16:48:31 +01:00

I found on the net that render layer is not connected to composite and that's why I have it checked. I just tried to connect alpha to alpha and I got this

do you see like outline on image

I found on the net that render layer is not connected to composite and that's why I have it checked. I just tried to connect alpha to alpha and I got this ![scree_shout.png](https://archive.blender.org/developer/F12812844/scree_shout.png) do you see like outline on image

Germano Cavalcante commented

2022-01-20 17:12:39 +01:00

I see now. This is the same problemas as #81199 (Some effects [bloom, smoke, fire, ..] still don't save in PNG with transparent background (occlusion vs. emission))
In summary, PNG doesn't support emission colors.
For PNG it is confusing to define how an emission behaves when it is transparent.
Try saving in another format.

I see now. This is the same problemas as #81199 (Some effects [bloom, smoke, fire, ..] still don't save in PNG with transparent background (occlusion vs. emission)) In summary, PNG doesn't support emission colors. For PNG it is confusing to define how an emission behaves when it is transparent. Try saving in another format.

Germano Cavalcante commented

2022-01-20 17:12:53 +01:00

Closed as duplicate of #81199

Germano Cavalcante closed this issue

2022-01-20 17:12:53 +01:00

Germano Cavalcante commented

2022-01-20 19:31:05 +01:00

In #81199#1291907, @Vido wrote:
I tried to save render to .exr, .tga and .tif all I get is empty image, just check board

Maybe you're not using a good image viewer.
Remembering that the alpha is 100% in the entire image.
The emission, in the real world, beats transparency.

Here is the result of the render as EXR. It works as expected.

You can test with an Online Image Viewer if you prefer.
https://viewer.openhdr.org/

> In #81199#1291907, @Vido wrote: > I tried to save render to .exr, .tga and .tif all I get is empty image, just check board Maybe you're not using a good image viewer. Remembering that the alpha is 100% in the entire image. The emission, in the real world, beats transparency. Here is the result of the render as EXR. It works as expected. ![untitled.exr](https://archive.blender.org/developer/F12813064/untitled.exr) You can test with an Online Image Viewer if you prefer. https://viewer.openhdr.org/

Slobodan commented

2022-01-20 20:32:22 +01:00

Aha ok I see tnx, so GIMP does not open OpenEXR correctly but the Blender nether, when I open your "untitled.exr" in Video editing I get transparency shown only

Germano Cavalcante commented

2022-01-20 23:08:25 +01:00

Blender shows it correctly for me.
GIMP you have to take the alpha channel out to see.

Anyway, it's the exact same problem as #81199, and the developers are already aware and looking for an ideal solution for it.

Blender shows it correctly for me. GIMP you have to take the alpha channel out to see. Anyway, it's the exact same problem as #81199, and the developers are already aware and looking for an ideal solution for it.

Germano Cavalcante commented

2022-01-20 23:29:22 +01:00

Editing the alpha of the image, you can have a result that "works" in PNG.

Editing the alpha of the image, you can have a result that "works" in PNG. ![image.png](https://archive.blender.org/developer/F12813612/image.png)

Slobodan commented

2022-01-21 00:16:59 +01:00

@mano-wii tnx for helping out but it does not work for me

https://youtu.be/lM8HE0znRFw

Edit; When I open your exr in gimp and go on layer and remove alpha I got just white picture, so what Im doing wrong ?
Edit2: Ok so I found that I need first to add layer mask and select "transfer layer alpha channel" and then delete "layer mask" to reveal image but background is black and I need to have blue ball visable and alpha around it ...

So I also tried your compositing and does not work for me I get white .png when I save render

@mano-wii tnx for helping out but it does not work for me https://youtu.be/lM8HE0znRFw Edit; When I open your exr in gimp and go on layer and remove alpha I got just white picture, so what Im doing wrong ? Edit2: Ok so I found that I need first to add layer mask and select "transfer layer alpha channel" and then delete "layer mask" to reveal image but background is black and I need to have blue ball visable and alpha around it ... So I also tried your compositing and does not work for me I get white .png when I save render

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Transpared image rendered in Eevee when its saved its all white #95066