Unity - SetPixels 后 Texture2D 为空白

Question

 Texture2D crop = new Texture2D(size, size);
 crop.SetPixels(texture.GetPixels(x, y, size, size));
 crop.Apply();

The Texture2D texture is not a blank black screen (it's a colorful image which I'm trying to crop into), but after this chunk of code crop is just a black texture. No errors are thrown when the code is excecuted. The variables values are the following:

x = 80;
y = 0;
size = 480;
texture.width = 640;
texture.height = 480;

This code is for cropping an image down to a square.

The full code is this:

WebCamTexture texture = new WebCamTexture(device.name);
texture.Play();

int x, y, size;

if (texture.width > texture.height)
{
    y = 0;
    x = texture.width / 2 - texture.height / 2;
    size = texture.height;
}
else if (texture.height > texture.width)
{
    x = 0;
    y = texture.height / 2 - texture.width / 2;
    size = texture.width;
}
else
{
    x = 0;
    y = 0;
    size = texture.width;
}

Texture2D crop = new Texture2D(size, size);
crop.SetPixels(texture.GetPixels(x, y, size, size));
crop.Apply();

Answer 1

The way I see it you are creating a new texture but never setting a reference of data. This needs to be done by either loading it or setting each pixel individually.