I really enjoy having a high render distance for the amazing views you can get in Minecraft. I am currently running Optifine, Sildur's Vibrant Shaders Extreme and Soartex Fanver Texture Pack. Id really like to figure out a way to increase my performance while maintaining the graphics I've been tweaking to perfection. Ive been spending a lot of time in general tweaking performance for Minecraft but render distance seems to be the biggest killer. I have a powerful PC so im surprised render distance kills performance so badly (with the shaders at least). Im running a 6 core i7 5820k overclocked @ 4.5ghz, 32gb RAM with 10gb dedicated to Minecraft, RTX 2080ti, and Samsung 960 evo m.2 ssd. At 1080p, with render distance of 20 I get between 65 and 90 fps. Going up to just 25 render distance will drop fps down to the 50s. At 64 render distance I get around 15fps. For reference, with the texture pack on, but shaders turned off, I get around 150fps at 4k resolution with 64 render distance. What is it about the shader that even a strong pc cant handle?