For this exercise. I have set up my camera in front of a still life of a fruit bowl, I have placed my Key light to the left at 90 degrees. The first image I have taken is with no diffusion.
The next image is identical however I have added diffusion.
With diffusion added the light reading changes. To compensate you need to open up 1/2 a stop. Also the shadows are softer.
In this shot I have placed a large piece of white card 1m to the right of the subject. Here you can see that the white card has filled in some light to the right of the image however it requires some more light. In the next shot you can see how I moved the white card nearer.
At this distance the white fill card is much more efficient the right side of the image is well lit.
Just a little tweek. I have tried to move the Key light a few cm further away from the left side of the subject however I have no more room. I found that this light is a little too much. I have also straightened the perspective a little.
I personally liked the full aluminium fill as it allows us to see the fruit well however there are shadows which adds a sense of depth to me.
The shiny aluminium fill is a nice fill it covers quite evenly the right side of our arrangement. It is softer than the white card and adds more light than the dull side of the aluminium.
This crinkled aluminium fill gives a nice light to the fruit. Instead of the light been reflected to one spot is seems to be more even with some highlight and shadow created.