I am new to Photoshop and I am having difficulty making an impressionistic photo. I have a landscape photo and I have sized the image to: Ht 720 with a resolution of 150 pixels/inch. I also opened a Monet Painting in a new tab and color matched it. However, when I try to go to Pixelate filter, the Pointilize filter is grayed out. I am using a Macbook Pro with a M1 chip.