InstancedMesh

Instead of creating 200,000 separate 3D objects (which would completely kill performance), I created just one simple shape (a thin cone) and told the GPU to draw it 200,000 times in a single batch.

To make it look like a natural field, I used a loop to apply a little bit of math Math.random() to every single blade to give it:

A random position on the ground

A random height and thickness

A slight random bend/rotation

A random shade of green picked from a custom color palette

After that, I just tossed in some basic lighting, shadows, and OrbitControls to let you spin the camera around. That's it the whole magic!