It will be written in C++ and Vulkan, which will enable RT Hardware Acceleration on RTX GPU’s and potentially DLSS! It is currently written in Java and OpenGL 4.6, but in the near future we will be starting the transition to C++ and Vulkan. Focal Engine aims to be a drop in replacement renderer for Minecraft that enables a much expanded feature set for shader developers while keeping mod support for both forge and fabric mods on 1.14.4+.