fix(upscaling): reduce default value for RCAS

[SkrubbySkrubInAShrub]

Reduced the default sharpness of RCAS, values around 0.5 are more balanced and still allow the user to increase or decrease it when necessary. 1.0 was very oversharpened.

Summary by CodeRabbit

• Chores
  • Adjusted default upscaling sharpness setting to provide optimized visual quality baseline.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

A single default value adjustment in the Upscaling settings, reducing the DLSS sharpness initializer from 1.0f to 0.5f within the Settings structure. This is a straightforward configuration value modification affecting only the header declaration.

Changes

Cohort / File(s)	Summary
Upscaling Settings src/Features/Upscaling.h	Default value of Settings.sharpnessDLSS reduced from 1.0f to 0.5f

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat(upscaling): sharpening slider #1527: Modifies DLSS sharpness settings in the same Upscaling configuration structure.

Suggested reviewers

• davo0411
• doodlum

Poem

🐰 A tweak of sharpness, oh so fine,
From one to half—a gentle line,
DLSS now smoother, not so keen,
The finest tuning ever seen! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: reducing the default RCAS sharpness value from 1.0f to 0.5f, which aligns with the changeset and PR objectives.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

---

📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4dfddc4 and 4629d54.

📒 Files selected for processing (1)

• src/Features/Upscaling.h

🧰 Additional context used

📓 Path-based instructions (3)

**/*.{cpp,cxx,cc,c,h,hpp,hxx,hlsl,hlsli,fx,fxh,py}

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

Do not include TODO/FIXME placeholders; provide complete, working solutions

Files:

• src/Features/Upscaling.h

src/**/*.{cpp,cxx,cc,h,hpp,hxx}

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

src/**/*.{cpp,cxx,cc,h,hpp,hxx}: Ensure SE/AE/VR runtime compatibility; use runtime detection patterns (e.g., REL::RelocateMember())
Include robust error handling and resource management with graceful degradation in the plugin code

Files:

• src/Features/Upscaling.h

**/*

⚙️ CodeRabbit configuration file

**/*: When reviewing PRs, please provide suggestions for:

1. Conventional Commit Titles (if not following https://www.conventionalcommits.org/ or
   if the existing title does not describe the code changes):
   Format: type(scope): description
   Length: 50 characters limit for title, 72 for body
   Style: lowercase description, no ending period
   Examples:

   • feat(vr): add cross-eye sampling
   • fix(water): resolve flowmap bug
   • docs: update shader documentation

2. Issue References (if PR fixes bugs or implements features):
   Suggest adding appropriate GitHub keywords:

   • "Fixes feat: increased portal strict light limit #123" or "Closes feat: increased portal strict light limit #123" for bug fixes
   • "Implements feat: increased portal strict light limit #123" or "Addresses feat: increased portal strict light limit #123" for features
   • "Related to feat: increased portal strict light limit #123" for partial implementations

Otherwise, use your standard review approach focusing on code quality.

Files:

• src/Features/Upscaling.h

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Build plugin and addons

🔇 Additional comments (1)

src/Features/Upscaling.h (1)

59-59: LGTM! Sensible default reduction for RCAS sharpening.

Reducing the default from 1.0 to 0.5 is a reasonable balance—full-strength RCAS can introduce noticeable haloing and edge artifacts, especially on already-sharp content. The 0.5 value provides visible sharpening while leaving headroom for users who prefer more aggressive settings.

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

Using provided base ref: 4dfddc4
Using base ref: 4dfddc4
Base commit date: 2026-01-11T18:23:29Z (Sunday, January 11, 2026 06:23 PM)
No actionable suggestions for changed features.

[github-actions]

✅ A pre-release build is available for this PR:
Download