They do, they look epic af, but they require a whole lot more processing power wich as far as I'm informed, you don't really have right now
you can always google for some shaderpacks that you can after move to your new shaders folder in .minecraft folder after you have installed optifine, but that will only help you if you want to take single frame screenshots or play with the responsiveness of a powerpoint slideshow, cause it will really slow down your fps
@Retrochewy Shaders take a lot of PC-power. For example:
I can run Minecraft (when standing in my base) at ~700+ FPS (on Linux Debian I sometimes hit 1000 FPS (idk if it makes any diffrence)). That is with 16 chunk render distance and everything else pretty much on fancy and with 4x FXAA (which is anti-aliasing).
When I enable a shader pack (in this example an ultra shader pack) it drops down to ~70-100 FPS. I can run pretty much any ultra shader pack at 60 FPS or higher at these settings. But there are 1 or 2 that go under 60 FPS. With those I also need to start turning down settings.
Even when enabling low quality shaders it can still drop ~500 FPS for me (not exactly sure).
When you can only run at 40 FPS you probaly cannot run any shaders. MAYBE a very very low quality one. But I don't think it'll work out, unless you want to run at 10 FPS.
This is with an:
GPU: GTX 1070