Let's put things into perspective. Yes, I know, stupid pun. There are lots of little tricks we use as photographers to subtly convey the point we want to show. Using perspective and a vanishing point in your photos is a great way to emphasize the large scale of a landscape, or to add a sense of drama to your images. Let's see how.
Cornstarch or Corn flour (for thickening): 1 tablespoon = 2 tablespoons all purpose flour or. 1 tablespoon potato starch or rice starch or flour 1 tablespoon arrowroot 2 tablespoons quick-cooking (instant) tapioca For other uses such as the main flour it's rather tricky I think it's best to only substitute Corn flour if it's for thickening.
Potato Starch Flour This is a gluten-free thickening agent that is perfect for cream-based soups and sauces. Mix it a little with water first, then substitute potato starch flour for flour in your recipe, but use half the amount called for. It can be purchased in a health food store. Tapioca Flour This is a light, white, very smooth flour that comes from the cassava root. It gives baked goods a nice chewy texture.