[cloud]

This happens when RuneMate is being ran from the JDK instead of the JRE. To enter DirectX or OpenGL mode, you need to either specifically run RuneMate from the JRE or change the default to use the JRE instead. IntelliJ offers special options for doing this in the run configuration.

Please let me know if you need any more information or pictures.

 

[viewer]

My tutorial shows how to run IntelliJ with JRE

 

[cloud]

The JRE is no longer required by runemate to enter OpenGL and DirectX mode, so this is going to be unstickied.