Images you import into Motion may appear too bright or too dark.
Programs
Motion 4.0
Solution
To maintain compatibility with Final Cut Studio applications, Motion assumes that all imported still images are encoded with a gamma of 1/1.8. If the image is actually encoded with a gamma of 1/2.2 (for example, an sRBG image), then the image will appear too bright when viewed in Motion.
You can change the default gamma setting by selecting the image in the Media icon and choosing Window > Media or by pressing (Command + 5).
Select the Media icon in the Inspector and change the Gamma pop-up menu to the appropriate option for the image. If the image appears too bright, select Gamma 2.2. If the image appears too dark, select Gamma 1.8.