Hello everybody,

I just started with Krita, but I already have a lot of problems.

When I want to upload a photo in Krita, it crushes.
When I want to use GMIC, it crushes to
And (but it's a minor problem), I can't figure out how to draw a line that is thinner at the end and the beginning,
mine has just the same thickness everywhere.

If anyone could help me with those problems, my day would be saved

Thank you for your responses !

Lynn

Please use the correct forum.

Moved accordingly.

When you try to open the photo, how big is the file and what format is it (jpeg? Raw? png?)

And tapered lines requires a drawing tablet like the ones made by Huion and Wacom.

My photo is in JPEG and it is rather big: 5472 x 3648

And I have a Wacom tablet. Maybe I have to change the brush settings?
I already tried, but I don't really know what exactly to change...

and I am using a mac, maybe that is important too?

> When I want to upload a photo in Krita, it crushes.
Try upload to (dropbox/googledisk/free file hosting/...) zip archive file with this photo (jpeg as is can be preprocessed by web-services, so zip is more robust), maybe this photo can reproduce crash not only on your machine. If crash is reproduced only on your machine, you will need help from some advanced MacOS/unix power user to install last version of Krita and generate crashdump/coredump.

> When I want to use GMIC, it crushes to
Same again - you can give exact steps to reproduce on any other machine, or you need help from advanced user to generate crashdump, if it can be reproduced only on your machine.

> And (but it's a minor problem), I can't figure out how to draw a line that is thinner at the end and the beginning, mine has just the same thickness everywhere.
You want do to this with your hand pressure, or automatically without pen pressure?
If you want to use pen pressure, you can use brush preset with name 'Ink_gpen' ( http://dobrokot.ru/pics/i2016-03-12__15-54-52_93kb.jpg ), and if it doesn't work you can ask help for wacom tabled pressure detection
If you want thinner end of line without pen pressure, I am not sure there is way to do in Krita, it is better to use vector editor like Inkscape (Krita have vector support, but it is not polished as Inkscape).

Also maybe five strokes for line endings are comfortable enough for you, I am not sure:

His problem is actually that the OSX version is unstable(and unofficial) partially because of the OpenGL support being funny. He can try out the latest pre-alpha which has a lot of fixes or turn off the OpenGL support under settings->configure Krita->display.