Its also a good idea to place the waterfall to one side of the image.
How to make cloudy water for photography. Signs you have air bubbles in your tap water. Look at the light qualities not quant. Use a small aperture.
Aimless leading lines make for chaotic photos. Keep in mind that cyanotypes are only affected by UV light. You can shoot awesome photos on cloudy.
Not necessarily the smallest aperture your lens allows because this can sometimes cause image quality to deteriorate due to light diffraction but a value of around f11 or f16 should be fine. It will create a bubbly look on the water. Fill that up with water first then add milk to it.
Look at the light qualities not quant. For more control over post processing switch the file type from JPEG to RAW or RAW JPEG before you start shooting. Add your polarizing filter and twist the filter watching how the reflections change to settle on the best position.
You will often find the spray from the waterfall landing on your lens and will need to keep it wiped. Using ND and CPL filters can also enhance your cloudy day photographs. A CPL filter will help you manage reflections in the scene.
Some would say the cloudier the better because if your rainforest is high enough to be in the clouds you can capture some very atmospheric misty effects in the forest. ISO 400 f28 1250-second exposure. This is known as portrait format.