First Impressions of the Remaster
The long-awaited return to the Caribbean in Assassin’s Creed IV Black Flag Resynced brings a definitive visual overhaul to one of Ubisoft’s most beloved titles. Built on an updated version of the Anvil engine, this remake introduces ray tracing by default across both consoles and PC platforms. Unlike its predecessor, which relied heavily on precomputed lighting, Resynced offers modern upscaling technologies including DLSS 4.5, FSR4, and XeSS2, alongside frame generation support.
However, the launch version of the game presents several technical hurdles that can significantly impact both visual clarity and performance. While the core experience is a massive step forward from the 2013 original, players need to manually adjust specific settings to avoid blurry images, artifacts, and suboptimal frame rates. This guide breaks down exactly which configurations matter most for achieving a smooth, high-fidelity gaming session.
Fixing Broken Upscaling Implementations
The most critical issue in the current build of Black Flag Resynced lies in how it handles upscaling. Although the game ships with DLSS 4.5 DLLs, the implementation is flawed for most users. By default, only the "Performance" mode correctly utilizes the newer DLSS 4.5 preset M. If you select Quality or Balanced modes while enabling other options like Denoising Anti-Aliasing (DAA), the game incorrectly reverts to an outdated DLSS3 model.
This mismatch results in visual artifacts, including excessive TAA blur and instability that detract from the crispness expected from modern upscaling. To correct this, users must force the Nvidia App to override the graphics settings for Black Flag Resynced. Navigate to the DLSS Override Model Presets within the application’s graphics tab and manually set the Super Resolution preset to either DLSS 4.5 Preset L or Preset M.
A second, more pervasive issue affects all upscalers—DLSS, FSR, and XeSS alike. When using Balanced or Performance modes, the game incorrectly calculates the output resolution scale. For instance, Performance mode sets an output resolution scale of only 70%, effectively blowing up a lower-resolution image to fill your display. This results in a noticeably blurrier picture compared to native rendering.
To fix this without sacrificing too much performance, switch your upscaling mode to "Custom." Set the Resolution Scale to 100% and adjust the Maximum Dynamic Resolution to match the intended render resolution: 25% for Performance, 34% for Balanced, or 44% for Quality. Note that using Custom DLSS defaults back to Preset E; therefore, you must apply the Nvidia App override mentioned earlier simultaneously.
Critical Graphics Settings Explained
With upscaling stabilized, attention turns to individual graphics settings. The following analysis prioritizes visual fidelity while identifying where performance gains can be safely extracted.
Shadow Quality: The Performance Heavyweight
Shadow quality is the most taxing single setting in Resynced. It controls both near and distant shadow resolution, with a distinct transition point between high-quality close-range shadows and lower-quality distant ones. While Ultra High offers the softest, most detailed shadows, it comes at a steep performance cost.
Dropping from Ultra High to Very High yields approximately a 10% FPS improvement with minimal visual loss in many scenes. Moving down to High provides an additional 5% boost and maintains decent near-shadow quality, though distant shadows may appear slightly less detailed. For most systems, the "High" setting offers the best balance of performance and image integrity. Avoid Ultra Low or Very Low settings, as they introduce significant aliasing and blurring that become distracting during gameplay.
Ray Tracing Mode: Essential for Water
The game features three ray tracing modes: Extended (Global Illumination + Reflections), Standard (GI only), and Off. While disabling ray tracing saves performance, it is strongly recommended to keep "Extended" mode enabled if your hardware can handle it.
The primary justification for keeping RT on is the quality of water reflections. Black Flag takes place largely at sea level, meaning players spend considerable time looking at water surfaces. Screen Space Reflections (SSR), used when ray tracing is disabled or set to Standard, produce ugly artifacts such as halos around trees and disappearing reflections when moving the camera. Extended RT provides stable, high-quality reflections on puddles and ocean waves that SSR simply cannot replicate.
If performance is a concern, do not disable RT entirely. Instead, lower the Ray Tracing Quality setting from Very High to Medium. This reduces the performance penalty of extended ray tracing by about 4% while maintaining nearly identical visual quality for global illumination and reflections. Disabling RT entirely offers roughly a 16% performance boost on mid-range cards like the RTX 5060 Ti but results in noisier surfaces and inferior lighting.
Geometry, Loading Distance, and Water
Geometry Quality controls object detail density. While Ultra High looks impressive, it offers diminishing returns compared to Very High or High settings for performance-conscious users. Dropping to Medium provides a 5% FPS gain with only minor losses in distant tree details.
Loading Distance is crucial for minimizing "pop-in" as you sail through the open world. Setting this to High reduces draw distance slightly but recovers 2% of your FPS while keeping pop-in manageable. Lowering it further introduces noticeable asset swapping that breaks immersion without offering significant performance benefits.
Water Quality primarily affects surface simulation and foam detail. The difference between Very High and High is negligible, making "High" the optimal choice for stability. Dropping to Medium simplifies wave details but increases FPS by 4%, a worthwhile trade-off if you are chasing higher frame rates.
Vram Management and Texture Resolution
Texture resolution does not impact CPU performance but heavily influences VRAM usage on GPU-limited systems. On cards with less than 12 GB of VRAM, setting textures to Ultra High can cause stuttering or crashes. Dropping from Very High to High reduces VRAM usage by over 1 GB, potentially making the game playable on 8 GB cards.
To further reduce VRAM load without hurting visual fidelity significantly, consider lowering Ray Tracing Mode to Off (saving ~0.5 GB), and setting Loading Distance and Micro Polygon quality to Medium (another ~0.5 GB savings). For most users with 16 GB of VRAM or more, keeping textures at Ultra High is recommended for the sharpest image detail.
Optimized Presets: Hub Quality vs. Hub Performance
Benchmarking reveals two distinct optimization paths depending on your hardware tier:
- Hub Quality Settings: This configuration maintains ray tracing in Extended mode while optimizing shadows and geometry. It delivers performance similar to the game’s "High" preset, offering a roughly 20% FPS increase over the default Ultra High settings with minimal visual compromise.
- Hub Performance Settings: For lower-end hardware or those prioritizing frame rates, this configuration disables ray tracing and lowers shadow/texture quality. It achieves nearly double the performance of the Ultra High preset (a 59% increase), comparable to using the game’s "Low" preset but with better visual coherence.
What Works Well and Where It Falls Short
The remake succeeds in transforming a classic title into a visually stunning experience. The upscaling options, once manually corrected, provide excellent clarity. The decision to keep ray tracing optional rather than mandatory is wise, allowing players with older hardware to still enjoy the game.
However, Ubisoft’s implementation leaves much to be desired regarding user convenience. Changing most graphics settings requires a full restart of the application, making fine-tuning tedious. Additionally, the initial upscaling bugs highlight a lack of polish in the launch build that should have been addressed prior to release.
Who It Is For
This guide is essential for PC gamers ranging from those with high-end RTX 5090 systems seeking maximum fidelity to owners of mid-range cards like the RTX 4060 or RX 7800 XT who need to squeeze out every frame. The optimization tips provided ensure that Black Flag Resynced runs smoothly across a wide spectrum of hardware configurations.
Final Thoughts
Assassin’s Creed IV Black Flag Resynced is the definitive way to experience Edward Kenway’s pirate adventure. While it demands some manual intervention to fix its upscaling quirks and optimize settings, the result is a game that scales beautifully across hardware tiers. By applying these optimizations, players can enjoy stunning water reflections, detailed shadows, and smooth performance without falling victim to launch-day technical issues.