If you are searching for Opticraft 1.17 , you are likely looking for a way to boost your FPS, add shader support, or fine-tune your visual experience in the Caves & Cliffs update (Part 1).
However, there is an important distinction to make before you click any download links. opticraft 1.17 download
A: Not directly. Use OptiFabric (a separate mod) or switch to the Sodium mod for Fabric. If you are searching for Opticraft 1