Illumination Within Revived Optimised
⚪ Last updated 2008⚠️ Install Order · 3 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
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🔍 Analysis
- 👍 2.2% endorsement rate — high engagement, a strong quality signal
- 🏆 #99 of 308 Gameplay Effects and Changes mods in this game by downloads
📋 About This Mod
Illumination Within Revived 0. 92 - Optimised Now 10x more CPU friendly! By Martigen NOTE: This is an add on for IWR 0. 92, you need the original for this to work. :: WHAT IT IS :: This is a re-write of the scripting code for Illumination Within Revived. The original mod is a must-have for a lot of people, but can be quite taxing on the CPU. This version greatly reduces the CPU load while at the same time maintaining the original functionality of the mod. See the example screenshots below for a before (original IWR) and after (IWR-Optimised) effect of the mod. Thanks to Forum_software_sucks for permission to release this, and the original IW authors Slap and Modman. NOTE: Original IWR-0. 92 required (see download link below). :: WHAT IT DOES :: It\'s a relatively simple change, but if you\'re interested: Original IWR: In determing wether a window should be illuminated or not, each window mesh in IWR runs a series of checks for timeframe and weather. This equates to roughly 10 conditional check statements that get executed by the engine every frame. On its own, this isn\'t much at all, however when applied to all windows in an area it quickly adds up and bogs the CPU down. For e.g -- if using all of IWR-Shutters, IWR-Windows, and IWR-Lights this produces roughly 30 checks per frame, per window. Using the IC Marketplace as an example -- which has some 200 windows in it -- this means engine is processing 6000 checks each frame. Lets say your average FPS is 30, that\'s 90,000 extra conditional checks per second going on, in addition to everything else the engine is handling. IWR Optimised: Moves the timeframe checks from the window meshes to the player (in a script that runs just four times a minute), and instead toggles window activity by checking a set of global variables. Each window now has one conditional check for each of Shutters, Windows and Lights. Again using the IC Marketplace example, this means the optimised version runs 3 checks per window (if you\'re using all three mods), which equates to 600 checks per frame, compared to 6000, for the 200 windows in the Marketplace. Again using 30 FPS as an example, this translates to roughly 9000 conditional checks per second compared to 90,000 in the original. :: NEW IN 1. 1 :: Randomised timed transitioning is now available as an optional extra. Windows will randomly activate and deactivate within a defined period in the schedule, giving a more atmospheric and life like effect to the cities. Shops, Homes and Inns each have their own schedules and transitioning (to on and to off) periods. Cathedrals don\'t use transitions (it\'d look odd having different windows of a Cathedral turn on at different times!). And after midnight, only inns remain lit until early morning. There are now three versions: IWR-Slim - Lights, Windows and shutters all turn on at the same time when their schedule starts. Shops, Inns, Houses and Cathedral have differe
This is an optimization add-on for the Illumination Within Revived 0.92 mod, rewriting its scripting code to be 10x more CPU friendly. It requires the original mod to function and is aimed at players seeking improved performance without changing the mod's core features.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Performance boost: 10x CPU improvement is a solid selling point for older rigs
- Active community: 1,546 endorsements show players trust this optimization
- High download count (68,783) indicates it's widely used and tested
⚠️ Cons
- Last updated in 2008 — likely incompatible with modern game versions
- Requires the original mod, so you're juggling two downloads
For players who already use Illumination Within Revived and want to squeeze out better performance, especially on older hardware. Skip if you're on a modern system or haven't tried the original mod yet.
💡 Beginner Tips
- Make sure you have the original IWR 0.92 installed before adding this optimization patch.
- Since this mod is from 2008, check if your game version is compatible — you may need to use a compatibility patch.
- If you're using a mod manager, load this add-on after the original to ensure it overrides the scripts correctly.
📊 Mod Details
- Game
- Oblivion Mods
- Author
- Martigen
- Version
- 1.1
- Downloads
- 68,783
- Endorsements
- 1,546
- Category
- Gameplay Effects and Changes
- Created
- 8/15/2006
- Updated
- 1/7/2008
🔧 How to Install Oblivion Mods
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