By default, ePSXe uses a "Software Renderer." This is stable but limits the graphics to the original PS1 resolution. The is a library file that allows ePSXe to use the hardware power of your Android device’s GPU. Benefits of using the OpenGL Plugin: Higher Resolution: Play games in HD or even 4K equivalent. Texture Filtering: Smooths out jagged edges.
Enhancing PS1 Emulation on Android: A Guide to Downloading and Integrating libOpenGLPlugin.so for ePSXe