Hi Guys,
Is it possible to view Targa files (or any other image files) in thumbnails mode with Alpha Channels displayed?
Regards
Blueroly
Do you mean with the alpha channel ignored, like the "Hide Alpha Channel (Shift+A)" option in the standalone viewer?
Or do you mean you want to see the alpha channel on its own, converted into a grayscale image or similar?
Neither is currently possible with thumbnails, but they could be done via a viewer plugin (or modifying a viewer plugin, in the Targa case, since it's already done via a plugin).
The reverse of that, it's currently being ignored.
I now seem to recall that I've asked about this before but unfortunately i can't find the post. The Targa files are rendered images from 3ds Max, which are somehow different from a Targa image created in Photoshop. IIRC, when I save over the rendered files in Photoshop, they display correctly in Opus. I'll check and get back to you. Thanks.
Ignore that, they also display without the Alpha channel when saved in Photoshop.
If I load a PNG into Photoshop, save it as a TGA (choosing 32 bpp), then load that back into Photoshop, the alpha channel is gone, without involving Opus at all.
You have to jump through some hoops to get Photoshop to save a TGA file with alpha. You need to explicitly create a fourth channel and fill it with grayscale data before saving the image. Even then, Photoshop still won't use that channel for transparency after you load the TGA back into it; Opus will, however.
So your issue is probably not with Opus, but with what is creating the TGA files, with the added confusion that Photoshop doesn't really seem to support alpha in TGA (even if it can be tricked into saving it).
test_alpha.zip (80.2 KB)
[quote="leo"]If I load a PNG into Photoshop, save it as a TGA (choosing 32 bpp), then load that back into Photoshop, the alpha channel is gone, without involving Opus at all.
You have to jump through some hoops to get Photoshop to save a TGA file with alpha. You need to explicitly create a fourth channel and fill it with grayscale data before saving the image. Even then, Photoshop still won't use that channel for transparency after you load the TGA back into it; Opus will, however.
So your issue is probably not with Opus, but with what is creating the TGA files, with the added confusion that Photoshop doesn't really seem to support alpha in TGA (even if it can be tricked into saving it).
200dpi_wc6740_dopus.png
3ds Max.zip (741 KB)[/quote]
In that case, the image IS displaying correctly, as yours does, but in my case the alpha channel is part of the image.... if that makes sense - it should when you see it.
Thanks for the info Leo, but it looks like everything is working as expected?
Disclaimer: This is an eight year old project...my current work is of a much higher quality 
3ds Max.zip (741 KB)
That file seems correct in Opus, here at least.
Looks correct based on what Photoshop shows is in the alpha channel. (Photoshop calls it the "Alpha 1" channel, since Photoshop is not interpreting it as the alpha channel but just as a generic 4th channel after the R,G,B channels; it would call a 5th channel "Alpha 2" and so on.)
