2D procedural texture looks buggy with certain resolutions

Hi there,

I am procedurally generating textures, each of which are bound to an unlit texture Material with Offset 0, 0 and Tiling 1, 1. When I generate the textures, they work great with many resolutions and very poorly with others.

Here is what it looks like when it works:

And here is what it looks like when it doesn't:

I have messed around with Texture2D() mipchain, the Apply() updateMipmaps argument, and filterModes. None have been to any avail. Here is my code below:

         // GENERATE AND APPLY TEXTURE
         Texture2D texture = new Texture2D(width, height, TextureFormat.ARGB32, false); // width and height are integers
         texture.filterMode = FilterMode.Point;
 
         // 0 -> width/height
         for (int x = 0; x < width; x++) {
             for (int y = 0; y < height; y++) {
 
                 // 0 -> 1
                 float i = ((float)x / (float)width) * (float)width / (float)height;
                 float j = (float)y / (float)height;
                 
                 bool open = ((Mathf.PerlinNoise((offset.x + i) * stretch, (offset.y + j) * stretch)) < clamp); // offset is a Vector2Int; stretch is a float; and clamp is a float
 
                 Color col = open ? empty : full; // empty and full are white and black, respectively
                 texture.SetPixel(x, y, col);
 
             }
         }
 
         texture.Apply();
         
         mat.SetTexture("_MainTex", texture);

What am I missing? Surely there's a way to make the sprite look normal. Another note is sometimes after initially generating the texture, the first time I regenerate the same texture after, it fixes some minor horizontal rendering issues. Any help would be greatly appreciated—thank you!