Apologies for the long post (I feel I should offer a potato).

On Retina resolution screens Blender 2.8 is rendering low-res aliased images in the viewport where it should be rendering crisp high-res images as per 2.7x.

The images below illustrate the issue:

Soft aliased edges in 2.8:

enter image description here

enter image description here

While crisp sharp edges in 2.7:

enter image description here enter image description here

And it has nothing to do with render / preview settings / samples as they are the same in both files and final renders are fine. I think it's a glitch in the 2.8 Beta version. Can someone report it? Or is there a setting I'm missing?

Thanks JK

  • 1
    $\begingroup$ "it should be rendering crisp high-res images" That is what final rendering is for, previews should be quick and responsive $\endgroup$ Commented Mar 13, 2019 at 12:58
  • $\begingroup$ I use the viewport render to check the quality of what the final render will be, using border rendering etc. I don't need quick, i need accurate! Just want to set it back to how it worked in 2.7x. $\endgroup$
    – JKCapeTown
    Commented Mar 13, 2019 at 14:07

1 Answer 1


This is a feature, which actually originated from using high resolution screens.
(Other users actually want to increase the pixel size.)

With highresolution screen viewing a small portion on your display, already requires lots of pixels to be rendered. If you just want to have a rough idea of the color and shapes, you don't need a highres version.

  1. Go to the Properties Panel.
  2. Go to the Scene Tab (the second from top).
  3. Go to the Performance section.
  4. Go to the Viewport subsection.

Change the Pixel Size attribute to 1x. If it is set to automatic, Blender probably realizes you are using a high resolution screen and adjust the preview pixel size for better performance.

  • $\begingroup$ Hi Leander, your suggestion about pixel size attribute successively halves the veiwport resolution. I'm trying to double it so it goes back to how it was in Blender 2.7x, smooth and sharp - not aliased. How do i report a bug? do you know? Thanks. $\endgroup$
    – JKCapeTown
    Commented Mar 13, 2019 at 14:05
  • $\begingroup$ Creating with Guidelines. $\endgroup$
    – Leander
    Commented Mar 13, 2019 at 14:41

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