Paint is slow when erasing

[Shocklink]

Im not sure if this is an inevitable part of Paint.Net or something but I am having an issue with erasing. There are 2 things I am having problems with
 

1. When erasing, it seems to erase in sections instead of a straight line meaning if I erase an area and while still erasing move my mouse, it will erase again after a certain amount of pixels (If you need a picture I have a great example)
2. It seems to me every time I erase and make an image transparent, my computer slows down horribly. This is not possible as the install was fresh and the PC is a monster (RAM is 32Gb and Image size is 6000x4000). Again, is this because of a setting or something I have running on my computer or is this a feature that Paint.Net has. My only assumption is the monitor is screwing with Paint.Net

I really love this program, been using it since I was a kid and now use it for office work. I never had this issue even when I was working on a 8Gb system with an i5, I just don't understand why my new work Laptop is giving me a pain.

Laptop Specs:
Lenovo W541
 - 32Gb RAM

 - 1Tb SSD

 - i7 4910MQ

 - 2k Monitor

 - Nvidia Quadro K1100M

[Red ochre]

Have you tried turning off hardware accelerated rendering? (click the gear icon in the the top right corner).

[Rick Brewster]

For #1, I do need a picture. I don't know what you mean. A video is even better.

 

For #2, please list specifically what actions you're performing for "every time I erase and make an image transparent." Which tool(s) or command(s) are you using? Which settings? Pretend you're writing out instructions for someone who doesn't know how to use Paint.NET.

[Ego Eram Reputo]

6000 x 4000 is quite an image!  How does it behave on something more modestly sized - say 800 x 600?

[Shocklink]

In order of the questions:

 - Yes Hardware Acceleration is on

 

 - 1 - http://i.imgur.com/Du790cv.gifv
(First line is done with a line tool, second line is done with a brush tool, last line is done with an erase tool, even though the erase part will be very difficult to see, its having the same exact effect as the brush tool

 

 - 2 - Probably the fastest way to replicate this without fail is
          1 - Open New Image

          2 - Set to any size

          3 - Select Brush/Erase Tool

               3A - The larger the brush, the more noticable the effect can be seen

          4 - Set "Hardness" to 100%

          5 - Brush/Erase area as desired (Doing so in a straight line makes the effect seen)

 

As far as other settings I leave them as default so I wouldn't know what else to tell you.

 

     - 3 - Even with an image size of 800 x 600 it still gets effected

Thanks for the help guys!

[Rick Brewster]

The stippling you're seeing is due to the way the new brush rendering engine works. This is actually the exact same thing that will happen in Photoshop (probably GIMP too). However, Paint.NET does not have a "spacing" parameter that you can adjust which would let you work around this.