Batch process .exr to .png: how to get transparent background?

[Hidari]

Hi there,

I was trying to batch process my blender rendered .exr files to png and even though the exr files are saved in RGBA, I cannot get them into png format with a transparent background. Regardless what I do, the backgorund is alsways black as one or more of the render layers in the exr shows a black background. I would only want the top view (RGBA) layer with the transparent background. How can I do that?

Thanks so much for your help!

Best,

Hidari

[walt.farrell]

Welcome to the Serif Affinity forums.

To get a transparent background you need to enable the menu option Document > Transparent Background. You could try recording a macro to enable that option, saving it from your Macro panel into your Library panel, and then running the macro as part of your batch job.

[Hidari]

Hi Walt,

thank you very much for your quick reply.

I tried to record the Macro as you suggested, but unfortunately, it did not work. I am still getting PNGs with black background. I, then, tried another Macro to delete the layers with background and only keep the to layer, but I cant get this to do the job either. I am attaching pics of my EXR files with layers to better illustrate my problem. I need my final PNG only to contain the top layer "View Layer.Combined.RGBA". This needs to be achieved in a batch process as I need to apply this on several hundreds of animation stills.

Again,thank you very much for your help!

Best regards,

Hidari

[John Rostron]

If you could post your original .exr file or an equivalent .afphoto file, we could try this for ourselves. We cannot really use your screenshot for this.

John

[Hidari]

Hello John,

I am attaching one of my exr files to this post. Thank you for your help,

Best,

Hidari

 

Edited March 22, 2021 by Hidari
Problem is solved and I dont want to further spread this file.

[telemax]

Try this macro: Alpha.afmacros

[Hidari]

Hi and thanks for posting the macro. It does make the background transparent, yet, now my png looks like this:

[telemax]

[Hidari]

And you get the same result when doing it through the batch process?

[telemax]

check this settings

[telemax]

5 minutes ago, Hidari said:

And you get the same result when doing it through the batch process?

Yes

[Hidari]

Hi telemax,

thanks so much! It worked using your macro.

For some reason, "Associate OpenEXR alpha channels" was checked in my case. I unchecked it and everything is perfect.

Thanks so much again!