GTA IV RTX Remix Update 1.1.5 – Complete Visual Overhaul Breakdown for Liberty City

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Liberty City has always been grimy, moody, and unforgettable—but now, it’s never looked more real. With the release of GTA IV RTX Remix Update 1.1.5, the ambitious fan-made path tracing project takes another important step toward fully modernizing Rockstar’s 2008 classic. While this update doesn’t introduce headline-grabbing new features, it delivers something arguably more important: refinement.

From fixing glass reflections and rain behavior to adding deeper configuration options for power users, Update 1.1.5 focuses on smoothing out immersion-breaking issues and improving stability across demanding PC setups. If you’re already running RTX Remix—or considering jumping in—this patch represents the most polished version of Liberty City yet.

GTA IV RTX Remix Update 1.1.5 – Changelog at a Glance

Update Area                Key Improvements
Visuals & TexturesFixed glass, bergen wood, and taxi metal surfaces
Weather SystemRefined rain particles and fixed restart bugs
User ControlNew .conf file options for light coronas and textures
StabilityCPU/GPU workload tools and general bug fixes

A New Light on a Classic City

For PC modding enthusiasts and long-time fans of Grand Theft Auto IV, the RTX Remix compatibility mod has been nothing short of revolutionary. Rather than acting as a simple texture upgrade, it fundamentally replaces the game’s lighting model with real-time path tracing, introducing physically accurate global illumination, reflections, and shadows across Liberty City.

This transformation turns familiar streets into something entirely new—neon lights bounce off rain-soaked asphalt, interiors glow naturally through windows, and nighttime scenes feel cinematic rather than flat. Update 1.1.5 doesn’t reinvent the mod, but it polishes its rough edges, addressing community feedback and fixing subtle issues that impact immersion over long play sessions.

Deep Dive: What’s New in Update 1.1.5?

GTA IV RTX Remix Update 1.1.5 Breakdown for Liberty City

Update 1.1.5 is a precision-focused patch that targets specific visual glitches, weather behaviors, and usability limitations discovered after the mod’s initial rollout. The changes may be subtle, but they significantly improve consistency and realism.

1. Visual Fidelity and Mesh Fixes

The path tracer’s interaction with GTA IV’s original assets wasn’t always perfect—and this update tackles several of the most noticeable offenders.

Glass and Transparency
Various glass surfaces, including car windows and building panes, have been corrected. These fixes eliminate strange reflections and transparency issues, making glass behave more realistically under path-traced lighting.

Surface Texture Adjustments
Specific materials—most notably bergen wood textures found on docks and crates, along with metallic taxi cab surfaces—have been refined. These materials now respond properly to light, improving realism and preventing surfaces from looking overly flat or incorrect.

2. Weather & Atmospheric Improvements

Weather effects are notoriously difficult in a path-traced environment, and rain has been a key focus for refinement.

Rain Particle Overhaul
Rain particles now feature decreased collision thickness, preventing heavy rainfall from looking like a solid wall. This results in more natural downpours, especially during storms in Algonquin.

Bug Fixes and Behavior Tweaks
A bug that caused rain effects to restart incorrectly has been fixed. Additionally, the option to disable raindrops on translucent vehicle windows now works as intended, allowing players to fine-tune their wet-weather experience.

3. Enhanced User Control and Configuration

For players who love tweaking every visual detail, Update 1.1.5 adds meaningful new options.

Advanced Config File Options
By editing the rtx.conf file, users can now:

  • Disable projected light coronas (the bloom around streetlights)

  • Unhide certain textures that were previously locked

These changes allow for greater customization, whether you prefer a cleaner, more realistic look or a more cinematic presentation.

Interface Improvements
The in-game configuration menu has received layout improvements, making RTX Remix settings easier to navigate and adjust on the fly.

How to Install the GTA IV RTX Remix Mod (2024 Guide)

Ready to experience Liberty City with path tracing? Here’s how to get started.

What You Need First

  • A legally owned, up-to-date copy of Grand Theft Auto IV: The Complete Edition (Steam or Rockstar Launcher)

  • A powerful PC — RTX Remix is extremely demanding

    • Recommended: NVIDIA RTX 40-series or AMD RX 7000-series GPU

    • A strong CPU is essential to reduce bottlenecks

  • Patience and attention to detail

Installation Steps

  1. Prepare Your Game
    Launch GTA IV once to complete initial setup, then fully update and close the game.

  2. Download the Mod
    The only official source is the mod’s GitHub repository. Search for “GTAIV.RTXR” by xoxor4d. Avoid third-party links, as they may be outdated or unsafe.

  3. Run the Installer
    The installer will strongly recommend installing a compatible version of FusionFix. You must accept this—FusionFix is essential for stability and RTX Remix compatibility.

  4. Launch and Configure
    Use the provided .bat launch files (such as _LaunchWithProcessorAffinity_Half_GTA4__Half_Remix.bat) to balance CPU and GPU workload. Once in-game, adjust path tracing and upscaling settings to match your hardware.

Performance Expectations & Essential Troubleshooting

RTX Remix fundamentally changes how GTA IV renders—and the performance cost is significant.

What to Expect

Extreme GPU Demand
Path tracing is the most demanding rendering method available. Even high-end GPUs will struggle without upscaling. DLSS or FSR is mandatory for playable frame rates.

CPU Bottlenecks Are Normal
GTA IV is famously CPU-heavy. Don’t worry if GPU usage isn’t maxed out—this usually means your CPU is the limiting factor.

Top Troubleshooting Tips

  • Severe Stuttering?
    Always use the included .bat launch files to better distribute CPU threads.

  • Low FPS or GPU Usage?
    Lower Draw Distance and Detail Distance in the original GTA IV settings menu to reduce CPU strain.

  • Textures Look Unchanged?
    This is expected. RTX Remix focuses on lighting first. Texture upgrades will come later from the community.

The Bottom Line: Is Update 1.1.5 Worth It?

Absolutely.

For existing users, Update 1.1.5 is a must-install. The fixes to rain behavior, glass rendering, and configuration controls noticeably improve visual cohesion and stability.

For newcomers, this is the best entry point yet. The update demonstrates active development and a clear focus on refinement rather than gimmicks. While the mod demands powerful hardware and patience, it stands as one of the most impressive technical achievements in modern PC modding.

With the lighting foundation now more stable than ever, Liberty City is ready for the next wave of community-driven enhancements—high-resolution textures, custom assets, and further visual tuning. Update 1.1.5 isn’t just a patch; it’s the groundwork for the future of GTA IV RTX Remix. 

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