A new shader injector mod for Final Fantasy VII Rebirth is being developed to improve the game’s lighting during regular gameplay. The mod focuses on adding screen space ray traced shadows, helping small objects, hair, foliage, and character models cast more natural shadows across the world.
Final Fantasy VII Rebirth looks impressive in major cutscenes, but some gameplay areas can appear flatter than expected. Small environmental details often lack shadowing, which can make objects feel less connected to the ground and reduce depth in outdoor locations.
The upcoming mod aims to address that issue without requiring full ray tracing. It modifies parts of the game’s lighting shader to add more detailed contact shadows while keeping the performance cost relatively low.
Why Final Fantasy VII Rebirth Can Look Flatter During Gameplay
Final Fantasy VII Rebirth uses a modified version of Unreal Engine 4, the same engine used for Final Fantasy VII Remake. However, Rebirth has a much larger open world, which requires a different lighting approach.
A larger world creates more pressure on performance. Developers need to render long viewing distances, large environments, foliage, towns, enemies, and effects at the same time. To keep the game running well, some detailed pre baked lighting and shadow techniques used in smaller areas may have been reduced.
This does not mean the game looks poor. Its character models, cinematic scenes, environments, and visual effects remain strong. But gameplay lighting can sometimes lack the fine shadow detail that makes a world feel more realistic.
| Visual Issue | Expected Mod Improvement |
|---|---|
| Flat looking gameplay areas | More depth through contact shadows |
| Hair with limited shading | Hair shadows on faces and clothing |
| Foliage without detail | Grass and plants cast clearer shadows |
| Objects appearing detached | Stronger shadows where surfaces meet |
| Some lamps and torches | Better local light shadow effects |
Screen Space Ray Traced Shadows Offer a Practical Fix
The mod uses screen space ray traced shadows, often called SSRT shadows. This technique uses depth information already visible on screen to estimate where smaller shadows should appear.
It is different from full hardware ray tracing, which can be much more demanding in a large open world. SSRT works best for close range details, including grass, hair, objects touching the ground, and fine geometry around characters.
The technique can also help with local light sources. Lamps, torches, and other smaller lights may gain more visible shadows in areas where the original game disables some shadow casting to save performance.
The Modder Reduced the Performance Cost Significantly
Creating the mod required reverse engineering the game’s compiled lighting shader with graphics debugging tools. An early version of the enhanced shadows reportedly added around 3 milliseconds of rendering time per frame, which would have been too expensive for smooth 60FPS gameplay.
After several optimization passes, the developer reduced the added cost to about 0.44 milliseconds at native 4K resolution on an RTX 3080. That is still a performance cost, but it is much more practical for players with powerful graphics cards.
The shader injector could also support future visual changes beyond shadows. Potential improvements may include post processing adjustments and other lighting changes, depending on what the developer decides to add.
There is no release date for the mod yet. However, the early results show how targeted shader changes can improve Final Fantasy VII Rebirth’s gameplay visuals without relying on full ray tracing.
Discussion (0)
Be the first to comment.