TIFF file missing glow from 3d render when imported into Affinity Photo

[Ibrah]

I made a 3D render inside Blender with a light emission effect, I then exported it as a TIFF 16-bit, non-compressed file, in RGBa with a transparent background. Inside the photo viewing program Irfan View, the file shows the light emission effect. However, inside Affinity Photo and Designer as well as Windows Photo Viewer the image shows the render without the light emission effect. Can someone explain what is going on and how I can avoid having this issue inside the Affinity programs?

I suspect it has something to do with RGB color management settings and alpha channels but alas I don't know what I'm talking about

The image data inside Affinity Photo appears as: 7680 x 4320px, 33.18MP, RGBA/16 - sRGB IEC61966-2.1 

[telemax]

It looks like IrfanView ignores Alpha. Try this:

 

[Ibrah]

2 minutes ago, telemax said:

It looks like IrfanView ignores Alpha. Try this:

 

Filing the background alpha makes the missing glow appear along with a black background. Is there a way to avoid having the black background appear with the glow? What am I missing? Any idea on how I can avoid this issue in the future and have the glow be part of the other channels?

[telemax]

See the options for these settings

Edit > Preferences > Colour

[Ibrah]

I played with all three settings, reimporting the image after each setting combination, but nothing changed. 

[Callum]

Hi Ibrah,

Welcome to the forums

I think its going to be hard to advise on this without a copy of the file so I can try some things at my end, if you don't want to post it publicly I can provide a private link to our DropBox for you please let me know.

Thanks

C

[Ibrah]

On 7/26/2021 at 6:21 AM, Callum said:

Hi Ibrah,

Welcome to the forums

I think its going to be hard to advise on this without a copy of the file so I can try some things at my end, if you don't want to post it publicly I can provide a private link to our DropBox for you please let me know.

Thanks

C

A dropbox link would be great please and thank you!