You guys are misusing the word anamorphic - anamorphic 1080p would be 1440x1080 (with black bars in case of 2.35:1 movies), which would then be stretched to 16:9 for viewing.
Sorry haha, I just kept thinking back to anamorphic DVDs, it was the only word I could think of
I use MPC-HC with MadVR too but I use Lanczos 4 taps with anti-ringing filter and debanding. Is NNEDI3 a lot better?
I don’t know if it’s A LOT better, but if your machine can handle it, you may as well use it. I couldn’t see any differences in RotJ 2.5 between Lanczos 4, and Lanczos 4+NNEDI3, but other sources will give you better output
You can see some better examples here: https://wiki.mikejung.biz/MadVR_Chroma_Upscaling_720p_Image_Quality