PixHammer

// By default Godot does not include a local y space billboard option within the StandardMaterial3D, and only includes a world up.
// This is annoying, as for a lot of effects you need the billboard to align with an axis that isn't world up.
// For example bullet tracers, or muzzle flashes shown from the side, or grass aligned with a slopes normal.
// This shader adds this feature.
// To use it, simply add this as the shader on a quad's material. 

shader_type spatial;
render_mode blend_mix,depth_draw_opaque,cull_back,unshaded;
uniform vec4 albedo : source_color;
uniform sampler2D texture_albedo : source_color,filter_linear_mipmap,repeat_enable;

PixHammer

using UnityEngine;

/// <summary>
/// Provides means to deep-copy a TerrainData object because Unitys' built-in "Instantiate" method
/// will miss some things and the resulting copy still shares data with the original.
/// </summary>
public class TerrainDataCloner {
    /// <summary>
    /// Creates a real deep-copy of a TerrainData
    /// </summary>