Graphical issues with shaders

1. Install the latest graphics driver for your system (see How to install GPU drivers)
2. Replicate the issue on OptiFine without a mod loader
   1. If the issue happens with OptiFine without a mod loader, then the issue is likely with the shader itself or an incompatibility with your system
   2. If the issue does not happen, then please create a support ticket using the Issue ticket type and link this page.