There are bugs in RTX itself. It's not the lack of textures in the resource pack, but rather an RTX bug. Attached are images. I tried to change numerous settings on the video card, updated all the drivers, but nothing solves. Horses (normal, zombies and skeletons), mules and donkeys turn completely black. Villagers are left without parts of their clothing (hats, sleeves, pants, eyeglasses). Banners are missing the player-made icon. Armor stand in the head region, creates an empty field where effects from other blocks pass through unseen. Players get position bugs of character body parts. My GPU is RTX 3050ti