Pixelization effect, turn off AA?

Unity Engine
1

Hello,

Is there any way I could remove this pixel smoothing (semitransparent pixels on edges)?

3149161--239306--upload_2017-7-18_13-53-25.png
3149161--239306--upload_2017-7-18_13-53-25.png953Ă—531 16.6 KB

Code I am using:

public class ScreenPixelization : MonoBehaviour
{
    [Range(1, 25)] public int resolution = 8;


    void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        RenderTexture lowRez;

        int w = source.width / resolution;
        int h = source.height / resolution;

        lowRez = RenderTexture.GetTemporary(w, h);
        lowRez.filterMode = FilterMode.Point;

        Graphics.Blit(source, lowRez);
        Graphics.Blit(lowRez, destination);
    }
}

Thanks!

2

You have MSAA or FXAA or Post Effect AA enabled.

A render texture (not a temporary one) is able to exclude MSAA if that’s the problem. Otherwise don’t render it with AA to begin with.

3

My quality and camera settings:
3149249--239317--upload_2017-7-18_15-5-32.png3149249--239318--upload_2017-7-18_15-5-59.png

As you can see I have AA and MSAA disabled. Is there something Ive missed?

4

Anyone? I found some questions about same problem and they also not answered. This should not be very hard to solve

5

bump?

6

The issue you’re seeing is due to bilinear sampling of the original render texture, in part likely caused by the initial screen resolution not being a multiple of 8, though correcting for just that will just mean all of the samples will be “blurry” add they’ll be bilinearly sampled from the exact center of 4 pixels.

Try setting the source texture to point filtered.

7

I tried setting my screen to 512x256
3165976--241055--upload_2017-7-31_12-42-45.png

Also I update the code and set source texture to point filtering

    void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        RenderTexture lowRez;
        Debug.Log("SOURCE: " + source.width + " " + source.height);
        var w = source.width / resolution;
        var h = source.height / resolution;
        Debug.Log("TARGET: " + w + " " + h);
    
        source.filterMode = FilterMode.Point;     
        lowRez = RenderTexture.GetTemporary(w, h);
        lowRez.filterMode = FilterMode.Point;
       
        Graphics.Blit(source, lowRez);
        Graphics.Blit(lowRez, destination);
        RenderTexture.ReleaseTemporary(lowRez);
    }

Still I have this AA :frowning:

8

Using that code exactly as is with either deferred or forward with MSAA disabled works perfectly for me. I’m using Unity 5.6.1 to test, and I disabled MSAA directly on the camera (Allow MSAA).

9

Could it possibly be driver AA from driver control panel or such?

1 Like
10

All driver settings were application controlled. I tried to set them off but AA still appears.
The only way I was able to get sharp pixels on edges was rendering to already created low res texture using camera. And then drawing it using OnGUI method. I dont like this solution because of some problems with different resolutions and unity shows annoying popup if there is no camera that rendering to display.
I tried shader solutions but they also produce AA.