
Modrinth · Minecraft mod
OptiCores
A client-side rendering optimization mod for NeoForge, featuring asynchronous culling specifically tuned for integrated graphics (Intel UHD/Iris Xe).
Quick answer
Which OptiCores release should I use?
OptiCores 1.1.0 targets 1.21.1, 1.21.2, 1.21.3 with Fabric. It must be installed on the client. Do not install it on the dedicated server. No extra mods listed for this file.
Where it goes
Is OptiCores required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does OptiCores 1.1.0 need?
1.1.0. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add OptiCores without breaking your instance.
Built for OptiCores 1.1.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.1.0. It targets 1.21.1, 1.21.2, 1.21.3 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.1.0. It opens that exact file at the source.
About this project
What does OptiCores add?
Thank you for the support!, Now i am going to continue working on the Opticores project.
Opticore: Asynchronous Rendering Optimization
Opticore is a client-side companion mod for Embeddium and Sodium on NeoForge 1.21.1. It is specifically designed to alleviate the "Main Thread" bottlenecking found on systems using integrated graphics (Intel UHD, Iris Xe, and mobile CPUs).
Core Functionality
Asynchronous Culling Pipeline: Unlike standard culling methods that run on the main render thread, Opticore offloads Euclidean distance and Frustum-intersection math to a background worker thread.
Concurrent Data Management: Rendering visibility results are stored in a thread-safe ConcurrentHashMap, allowing for O(1) lookups during the render cycle with near-zero latency.
Dynamic Load Throttling: The mod monitors getSectionStatistics() to detect heavy chunk-loading periods. During high I/O spikes (e.g., world joining or teleporting), the mod temporarily reduces entity rendering overhead to prioritize terrain generation.
Technical Compatibility: Includes safety bypasses for custom block entity renderers (such as those in the Create Mod) and integrates with Distant Horizons to prevent culling during LOD baking passes.
Performance Impact
Opticore is most effective in environments with high entity counts (villages, farms, or modded dimensions). By offloading culling logic, it helps stabilize frame times and reduces "stuttering" during world exploration on 2-core and 4-core processors.
Project description from Modrinth.
Pick your setup
OptiCores by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.1
1 loader build26.1
1 loader build1.21.11
3 loader builds1.21.10
3 loader builds1.21.9
3 loader builds1.21.8
3 loader builds1.21.7
3 loader builds1.21.6
3 loader builds1.21.5
3 loader builds1.21.4
3 loader builds1.21.3
3 loader buildsShowing the newest 12 of 15 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
OptiCores versions and loaders
1.1.0
Opticores-1.1.0-fabric-mc1.21.1.jar
4 Aug 2026
1.0.9
Opticores-1.0.9-mc1.21.1.jar
21 Jul 2026
1.0.8
Opticores-1.0.8-mc1.21.11.jar
20 Jun 2026
1.0.0-mc1.20.1
opticores-1.0.0-mc1.20.1.jar
18 Jun 2026
1.0.6
opticore-1.0.6 (1).jar
28 May 2026
1.0.6
opticore-1.0.6.jar
28 May 2026
1.0.8
Opticores-1.0.8-mc1.21.11.jar
28 May 2026
1.0.8
Opticores-1.0.8-mc1.21.11.jar
26 May 2026
1.0.6
opticore-1.0.6.jar
22 May 2026
1.0.6
opticore-1.0.6.jar
22 May 2026
1.0.6
Opticores-1.0.6.jar
18 May 2026
1.0.5
opticore-1.0.5.jar
16 May 2026
Looking for an older file? The official Modrinth project page is in Resources.

