[YM!] Veil Iris Lights Compat (VILC)

Added

• Dedicated Iris-compatible fullscreen light pass
• Veil point-light support with shaderpacks enabled
• Veil area- and cone-light support with shaderpacks enabled
• Multiple-light color accumulation and color mixing
• Perceptual RGB luminance normalization
• Configurable exposure, color strength, neutral brightness, and luminance boost
• Configurable color saturation with a slightly richer default
• In-game configuration screen with live updates
• Default O key binding and mod-list configuration entry
• Persistent JSON configuration
• F3 diagnostics for pass state, light counts, voxel occlusion, and render settings
• World-position reconstruction from the Iris depth buffer
• Screen-space surface-normal reconstruction
• Angle-dependent diffuse surface lighting
• Veil voxel-grid integration for occluded lights
• DDA-based block shadow calculation
• Leaves as voxel shadow casters
• Partial light transmission through leaves

Improved

• More consistent brightness between red, green, and blue lights
• More natural surface response based on the angle toward each light
• Smooth grazing-angle lighting without a hard Lambert cutoff
• Texture preservation under bright and overlapping colored lights
• Continuous color mixing without dominant-channel seams
• Color-neutral intensity compression for smooth RGB transitions
• Brighter shaderpack lighting with additional tone-map headroom
• Expanded exposure and color-strength adjustment ranges
• Stabilized reconstructed surface normals to remove view-dependent striping on flat surfaces
• Gamut-safe saturation adjustment without hard channel clipping
• Recentered the configuration layout with consistent title, hint, slider, and button spacing
• Reduced unnecessary DDA work outside a light's range or on unlit surfaces
• Light-block self-occlusion handling

Fixed

• Fixed Veil lights disappearing when shaderpacks were enabled
• Fixed light colors appearing mostly white
• Fixed light influence moving with the camera or cursor
• Fixed harsh color transitions between differently colored lights
• Fixed overexposed areas losing their visible texture
• Fixed occluded Light Blocks appearing disabled while the camera was nearby
• Fixed leaves failing to cast voxel shadows
• Replaced direct client-memory voxel uploads with persistent pixel-buffer staging to avoid the NVIDIA driver crashes observed during voxel-grid updates