Could you give me some examples of low roughage foods and then a list of clear liquid diet foods?

Ok...... you cannot stay on a clear liquid diet for enough time to have it lower weight. you CAN increase water/flavored water at the expense of less food (like rehydrating after exercise) and that is reasonable. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/low-fiber-diet/art-20048511.