feat: adjustable ambient lighting via ImGui sliders

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- SceneUBO expanded: added vec4 ambientColor at offset 400
- UBO size: 448 → 464 bytes
- Fragment shader: ambient from UBO instead of hardcoded constant
- VulkanRenderer: AmbientColor property (default 0.01, 0.01, 0.02)
- ImGui: R/G/B sliders for ambient (0.0-0.5 range)
- Packed at offset 400 after 4 shadowParams (64 bytes at 336)

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emil28092005

2026-06-19 09:34:09 +03:00

parent 9555de60ef

commit 74dcc45543

7 changed files with 15 additions and 2 deletions

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