I am NOT the author of this mod, I am uploading it here for posterity. please give thanks to the following members from the Resident Evil Modding Forums for making this mod!
This mod fixes some things the game's stock shaders are missing while removing the game's film grain effect to provide a cleaner and better overall image with RE4 HD. Can be used with the Natural Gradients mod and adjusting the game's brightness to resemble the look of the GameCube/Wii versions of the game more closely. Tested on v1.0.6 and v1.1.0 and it still works as long as you install this mod correctly. Screenshots were taken on the same graphics settings (1080p, MSAA x8, default HD textures, Shadow Quality set to High, Motion Blur disabled) with a brightness of +40.
BACK UP YOUR ORIGINAL FILES BEFORE INSTALLING THIS MOD!
1. Move or delete the original version of the following files from both BIO4/ImagePack and BIO4/ImagePackHD folders:
2. Copy the 07000000.pack file from this archive in both BIO4\ImagePack and BIO4\ImagePackHD folders.
3. Enjoy Resident Evil 4 Ultimate HD Edition with the film grain removed and touched up shaders.
Original authors: Martin/Sigma (shader fix), Marcelo20xx (film grain removal), DarkSamus (combining the two mods in this .pack file).