File Extension RD5 File Format Ray Dream Designer Graphics RD5 stands for Ray Dream Designer Graphics. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question What is the difference between NVIDIA Graphics and Integrated Graphics? Which type of tool we need to build web design and graphics design? How are graphic and web design different?