I’ve finally fixed the End dimension the shading works well and also added aurora effect in the sky (this genuinely required help from claude), and the good news is it does not effect fps much or even at all. Also there is an alternation in sky light between the cheese yellow and slight pink (u can see the variation in both images). But I ran into 2 different issues here:

• The ender mobs (enderman,mites, dragon) are not rendering their purple from their eyes aka no eyes.
• When moved to outer end island or when dragon is killed in main island, the sky seems to render the grainy effect (which looks a bit odd like its a whole milky way)
  So, I’ll try to patch it today night, cuz these are some common shader issues while making one, there are enough documentation from various sources like iris, shaderLABs etc. Wish me gl!