What is the effect of camera and flash compensation on TTL flash ?

Here I want to show you the effects of different exposure using compensation skill and TTL fill-in flash technique to get optimal results. Which one do you like the best ? Your TTL flash is a very powerful tool to painting the light.  It is one of the most important invention in camera technology. Combining TTL flash with different metering mode of your camera can yield very different results. Here are 4 pictures taken side by side with different settings on  the Bismarck Palm to show the various exposure control of a camera.:

+1 stop.  f/4.0.  Notice the lighter tone on the Palm leaf  but over exposed ambient light.			-1 stop. Notice the darker tone. It has a certain drama to the darker tone but no shadow detail.
-1.5 stop TTL fill-in. Note this picture,   it has shadow detail from the fill-in flash and good control on the ambient light.			Full TTL without flash compensation . It is overexposed by at least 1 stop..
As you can see that there are many ways to create a picture just by using different compensation for main exposure and TTL fill-in flash.