GPU Instanced Foliage Renderer

Built for Real Scale

This is a renderer, not a content pack — bring your own mesh and this asset handles GPU-driven placement, culling, and instanced drawing at scale.

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💻

Fully GPU-Driven Pipeline

Placement, culling, and drawing all happen on the GPU via compute shaders and Graphics.RenderMeshIndirect. No per-instance CPU overhead.

🏔️

Real Terrain-Aware Placement

Samples your active Unity Terrain's actual heightmap directly. Detected automatically — no manual alignment required.

📐

Slope-Normal Alignment

Instances lean to match the terrain's slope instead of always standing world-vertical, with a tunable blend between the two.

⛰️

Slope-Based Placement Filtering

Thin or fully cull instances on terrain that's too steep, with a soft per-instance gradient rather than a hard, poppy cutoff.

🌾

Natural, Organic Distribution

Noise-driven density creates clumpy, irregular coverage instead of a uniform lawn. A single Scatter Amount slider blends between that and a perfectly even grid.

🚀

GPU Frustum Culling

Runs every frame, keeping only what's actually visible in the draw call.

🌬️

Dynamic Wind System

Six built-in presets (Calm through Tornado) or fully custom direction/turbulence/gust tuning, switchable live at runtime via a public API.

🎯

Distance-Based Texture LOD

A tunable near/far blur ramp keeps close-up detail sharp and distant, densely-packed instances free of aliasing/noise.

✂️

Alpha Cutout Support

Built in for cards, billboards, or any cutout-style foliage texture.

🔄

Runtime Instance-Count Changes

A public Reinitialize(int) method supports streaming or density changes at runtime.

🌱

Works With Any Mesh You Supply

Grass, flowers, rocks, debris, anything — this is a renderer, not a content pack.

Real-World Performance

Numbers from a standalone Release build — not Editor Play mode — on a 4GB legacy/budget GPU (NVIDIA Quadro M1200).

Instance Count	Avg Frame Time	Avg FPS	Min	Max	P95
500	14.89 ms	67	2.81 ms	39.65 ms	24.32 ms
2,000	20.78 ms	48	3.74 ms	62.73 ms	24.18 ms
5,000	38.61 ms	26	22.95 ms	54.23 ms	53.64 ms
10,000	63.66 ms	16	47.64 ms	78.80 ms	64.42 ms

Takeaway: Smooth, real-time performance up to ~2,000 instances even on legacy hardware, scaling down gracefully to 10,000+ for scenes that can afford it.

Note: Always benchmark in a real build. Unity's Editor Play mode reports misleadingly poor frame times due to present-wait/VSync overhead that isn't present in a built player — don't judge real-world performance from the Editor.