SetPixels not working on transparent pixels

Unity Engine
1

Using Unity 5.6.3p2

I have a Texture2D that has some dynamic shapes colored into it and the background is transparent.
I call GetPixels() to get a section of pixels to modify, and basically just set all of their colors to Color.black;
Then I call SetPixels() on the textures and then use Apply().

The pixels that had color and were not transparent will change to black, but the background part that is transparent, I cannot make it any color it just stays transparent.

Any ideas what I’m doing wrong?

2

Do you set the alpha value?

3

Yes and all colors in Color, such as Color.black, use the alpha value.
Also if I set the alpha to 0 then the visible pixels do turn transparent.

4

Don’t know then. Maybe show some code.

5

The blue part is the transparent area.

Color[] pixels = texture.GetPixels(left, bottom, right, top);

for(int i=0; i<pixels.length; i++)
{
    pixels[i] = Color.black;
}

texture.SetPixels(left, bottom, right, top, pixels)
texture.Apply()


6

Figured it out.
This can be caused by the Sprite Renderer’s Draw Mode being set to Simple.

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