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.
Sure, just subsitute same amount rice flour for corn flour. You can also use corn startch (aka 'corn flour' in europe) to make a lighter textured short bread-sub 1/4 corn startch for regular flour used.