Enhance image sampled blocks to be more translucent and glass-like

[ford442]

Improved the "JUICE" of the image sampled blocks by enhancing their glass-like visual properties.

• Lowered base glass opacity (authoredGlassMin from 0.30/0.38 to 0.15, authoredGlassMax from 0.78 to 0.70).
• Added an environment refraction calculation to the useAuthoredSampling block shader path to simulate realistic glass light bending.

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PR created automatically by Jules for task 8655165164921342192 started by @ford442

Summary by CodeRabbit

• New Features

  • Added environment-based glass refraction with tinted blending for more realistic glass rendering.

• Improvements

  • Reduced glass opacity ranges for block and image-based materials, creating a clearer appearance.
  • Refreshed the video asset manifest timestamp.

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Review failed

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 811db696-fac0-4ae0-8214-bb157b92dfec

📥 Commits

Reviewing files that changed from the base of the PR and between c1b0e63 and 9a7fe65.

📒 Files selected for processing (5)

• patch_wgsl.js
• public/assets/video/manifest.json
• src/webgpu/blockTexture.ts
• src/webgpu/materials.ts
• src/webgpu/shaders/wgsl/block/fragmentMain.wgsl

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📝 Walkthrough

Walkthrough

The change deletes the WGSL patch script, lowers authored glass opacity ranges, adds tinted environment refraction to the block shader, and updates the video manifest build timestamp.

Changes

Authored glass rendering

Layer / File(s)	Summary
Glass opacity inputs src/webgpu/blockTexture.ts, src/webgpu/materials.ts	Block textures and the imageSampled material now use authored glass opacity bounds of 0.15–0.70.
Glass refraction shader path src/webgpu/shaders/wgsl/block/fragmentMain.wgsl, patch_wgsl.js	The shader samples the procedural environment along a refracted direction, applies glass tint, and blends the result using glassMask. The shader patch script was deleted.

Asset metadata

Layer / File(s)	Summary
Video manifest timestamp public/assets/video/manifest.json	The builtAt timestamp is updated to August 5, 2026.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Possibly related PRs

• ford442/Tetris_WebGPU#301: Modifies the WebGPU block glass shading pipeline and authored glass parameters.
• ford442/Tetris_WebGPU#421: Modifies authored glass shading and block material settings.
• ford442/Tetris_WebGPU#467: Modifies authored glass refraction logic and opacity configuration.

Suggested reviewers: cursoragent, claude

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/glass-like-sampled-blocks-8655165164921342192

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