Author Topic: Excport 24 bit or 32 bit TGA/targa  (Read 327 times)

I'm doing some experimenting, i noticed i cannot export as 24 or 32 bit tga/targa Files. is it not supported?

screenshot 1: https://cdn.discordapp.com/attachments/523526601447702575/802237856235126794/unknown.png

Screenshot 2: https://cdn.discordapp.com/attachments/523526601447702575/802238577076338748/unknown.png

Update: Just to add some clarity. This is what i'm trying to do: https://cdn.discordapp.com/attachments/546135033216499737/802179046590251068/layercomp.png
Last Edit: January 24, 2021, 10:07:00 pm

TGA only supports 8bits per channel which means:

R = 8Bits
G = 8Bits
B = 8Bits

Total of 24Bits then 8Bits for the Alpha Channel making it 32Bits.

You cannot export anything higher for TGA like you can with say PNG 16Bits per Channel, or TIFF for 32Bits per Channel (32 bit linear float).

TGA only supports 8bits per channel which means:

R = 8Bits
G = 8Bits
B = 8Bits

Total of 24Bits then 8Bits for the Alpha Channel making it 32Bits.

You cannot export anything higher for TGA like you can with say PNG 16Bits per Channel, or TIFF for 32Bits per Channel (32 bit linear float).

OK. so why is it when i export the texture, open it in photoshop and go to channels. there's no Alpha Chanel.?


Photoshop handles Alphas differently then any other image editing program. If you're going to deal with PNGs you should use SuperPNG.

https://www.fnordware.com/superpng/

There are lots of posts online about this.

https://community.adobe.com/t5/photoshop/alpha-channel-on-png/td-p/10466548?page=1

https://community.adobe.com/t5/photoshop/how-do-i-save-a-png-file-with-an-alpha-channel-in-photoshop-cs5/td-p/5369920?page=1

https://community.adobe.com/t5/photoshop/png-not-opening-with-alpha-channel/td-p/9844587?page=1

Take your PNG into GIMP it shows properly or any where else, if you do it in Photoshop you need to extract the transparency to show it properly.



I would just use SuperPNG however.

I want to avoid 3rd party photo editing tools. i want a texture with a "alpha" channel exported out through substance.

how can i achieve this? because its not doing as such.

I want to avoid 3rd party photo editing tools. i want a texture with a "alpha" channel exported out through substance.

how can i achieve this? because its not doing as such.

As per the above screen shot I posted, just extract it from transparency if you want to do it in Photoshop.

Aegean. i would like to avoid Photoshop and the like. and have substance do it for me.

 Just to add some clarity. This is what i'm trying to do: https://cdn.discordapp.com/attachments/546135033216499737/802179046590251068/layercomp.png

PS. there is no "Transparency" exporter in the export dialogue only Opacity.

I assumed you were asking how to edit the alpha channel in Photoshop. If you want to have an output map stored in the Alpha channel then you're free to edit any template or make your own which does this for you.
Last Edit: January 25, 2021, 01:15:57 am