Hi I'm new to Krita, I've had enough of adobe and thought I'd try Krita.

The first problem I have ran into is opening a tiff file with an alpha channel.
In photoshop I could load alpha channel, delete selected, know I have transparency so I can put backgrounds behind the image.
Is this possible it Krita ?

When loading PNG's or Tiffs the color profiles seem to be messed up, the gamma is wrong, so its all washed out.
This is in 2.9 it didn't happen in 2.8.

cheers

Which verion of 2.9 are you using? The newest version should ask your which profile you want to assig to the png.

Krita is colour managed, so if you stick in unmanaged files, especially unmanaged 16bit files, it'll use the default for 16bit, which is a linear profile, which is why the gamma is washed out. I know PNG is supposed to have some mystery gamma chunk, but this is not read yet, and I don't know any equivalent in tiff.

edit: also, not quite sure about the alpha stuff, as far as I know it's possible with the same actions, which is why I am wondering if I am misunderstanding you...

Thats its I'm using 16bit per channel tiffs and pngs. I need the dynamic range for exposure control.
I don't have colour profile options saving from 3dsmax, so I don't know what the default is.
I tried a few different colour profiles in Krita and none of them worked.
I'm pretty sure 3dsmax is saving them out at a gamma of 2.2.
Just tried the 16bit png again and they don't load properly, I can't see anything, its just a blank grey window.
Exr's load fine

I still can't figure out how to load the alpha channel.
I see if I right click the layer I can load selection but it just creates a white mask.
Theres no load selection from alpha channel that I can see.

I'm using krita_x64_2.9.6.1.

you can import a mask, but, with some exr files, you need to set the transparency as the background color via image->change image background color and configure it there to be transparent.

Excellent thank you, thats what I needed.

I dropped in a another layer for the background and the background is washed out under the transparency of the exr.

Here's an example
https://onedrive.live.com/redir?resid=3 ... oto%2cjpeg

Once I apply levels to the exr with transparency the transparency is correct.

javadevil wrote:Once I apply levels to the exr with transparency the transparency is correct.

Hi Javadevil,

Since you're using Thea, for generating those beautiful images, are you sure you're letting it cook enough, until transparency get's full black and whte?

With unbiased renders that can happen with low samples.

Nice meeting you here btw

JQL wrote:

javadevil wrote:Once I apply levels to the exr with transparency the transparency is correct.

Hi Javadevil,

Since you're using Thea, for generating those beautiful images, are you sure you're letting it cook enough, until transparency get's full black and whte?

With unbiased renders that can happen with low samples.

Nice meeting you here btw

Hi JQL,


These are Corona renders, so not Thea time sample issue.

Adjusting the exposure isn't being saved, so if I start with an exr, drop in a background and other layers.
Play with the exposure, export to jpg, it doesn't save the way that it looks in Krita, it saves it without the exposure.
Is there a way to export and save the exposure settings ?

Not yet, we really should get down to doing that, as well as baking the current exposure and gamma when exporting to png or converting to a lower channel depth.

Boudewijn,

That would be great !

I've also noticed transforming layers can be really slow.
I had one exr and a jpg for a background and I was just trying move it, the latency is quite obvious, the layer doesn't catch up to the mouse movement for a second or two.

cheers

Moving is often faster with the transform tool (because that doesn't move in realtime, it only moves a preview).

Yes the Transform tool is faster, but it draws the entire image in the foreground and I cannot see the masked out areas from the top layer.

cheers