Use Oculus . Since Iris does not officially support the standard Forge loader, Oculus was created as a dedicated Forge port of Iris. It must be used alongside Embeddium or Rubidium (Forge ports of Sodium) to function. 2. SEUS PTGI Compatibility Overview

早在 2022 年，一些知名的光影大厂就开始适配 Iris。经过数年的发展，如今的 Iris 及 Oculus 已对 SEUS PTGI 的主流版本（尤其是 ）实现了近乎完美的支持。

If you cannot get SEUS PTGI to work with Oculus on Forge, you have two "Top Tier" alternatives that offer near-identical path tracing with perfect Iris/Oculus compatibility:

: If using the Create mod, you often need the Iris & Oculus Flywheel Compat mod to prevent rendering issues with moving parts when shaders are active. Setup Recommendations

if you are using the Create mod, as it fixes rendering issues between shaders and moving machinery. Installation Steps SEUS - Sonic Ether

While Oculus provides a backward-compatible platform that allows standard OptiFine shader packs to work natively, ray-traced paths like SEUS PTGI (specifically versions HRR 2.1 and HRR 3) carry unique engine requirements. The Software Ray-Tracing Hurdle

Before troubleshooting, it’s crucial to understand the "players" on the field.

如果你是一名“机械动力 (Create Mod)”爱好者，安装 Iris 或 Oculus 后，你可能会发现帧数下降得特别明显。这是因为“机械动力”依赖 引擎来进行大规模的实体渲染优化。当光影开启后，Flywheel 的优化会被禁用，导致性能瓶颈。

Next-Gen Minecraft Graphics: SEUS PTGI, Iris Compatibility, and the Oculus Forge Ecosystem

SEUS PTGI is currently incompatible with the Distant Horizons mod. Requirements for Installation