The moment i've seen CrushedPixel video on YouTube announcing shaders compatibility i immediately updated the mod, can't thank you enough for that.
So i loaded up one of my replays and imported some keyframes, some of which were spectating keyframes and i rendered the video straight away, the problem is that in the final video the spectating moments are too grayish and desaturated for some reason, only glass and glass pane blocks are rendered normally in that mode (i've tested several shaders)
Also, when rendering equirectangular videos with shaders the final video has vignetting enabled, black lines are clearly visible where the images are stitched together