This power allows the user to project his or her thoughts into another person's mind in the form of vivid pictures, thoughts and feelings, through physical contact. It works most effectively in communicating with others when words are not suited to the purpose.
The images projected into the target's mind are transparent, but incredibly vivid.
One can also "hack" the user's power to access his/her dreams by placing his or her hand on their faces―as shown when Renesmee fell asleep and Bella "peeped" in on her dreams.
Limitations
This power is very similar to Aro's tactile telepathy, given they both need to be in physical touch to activate their powers. Unlike most other mind-directed powers, this power cannot be blocked by Bella's shield due to Renesmee's second ability to penetrate shields.
Renesmee's thought projection behaves as the opposite of Edward Cullen's power of telepathy: while Edward can read the thoughts of others from a distance, she can project her thoughts into others by physical contact. Also, her mother Bella keeps everyone out of her mind while no one can keep her out.