some small grass and shader test

grass/High/High Grass.fbx.import

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grass/High/High Grass.obj.import

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grass/High/High quality.png.import

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grass/Low/Low Grass.fbx.import

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grass/Low/Low Grass.obj.import

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+generate_lightmap_uv2_texel_size=0.2
+scale_mesh=Vector3(1, 1, 1)
+offset_mesh=Vector3(0, 0, 0)
+force_disable_mesh_compression=false

grass/Low/Low quality.png.import

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grass/Low/Stem.fbx.import

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+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
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+animation/trimming=true
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grass/Tex/Grass.png.import

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grass/grass.gdshader

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+shader_type spatial;
+render_mode cull_disabled;
+
+uniform vec3 color: source_color;
+uniform vec3 shade: source_color;
+uniform sampler2D noise: source_color;
+uniform float noiseScale = 1.0;
+uniform float windSpeedScale = 1.0;
+uniform float windVertexOffsetScale = 1.0;
+
+varying vec3 worldPos;
+varying vec3 instance_origin;
+
+void vertex() {
+	worldPos = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+	instance_origin = MODELVIEW_MATRIX[3].xyz;
+	
+	vec2 timeOffset = vec2(TIME/windSpeedScale);
+	float noiseLevel = texture(noise, timeOffset + worldPos.xz/noiseScale).r;
+	float vertexWindOffset = noiseLevel * worldPos.y * windVertexOffsetScale;
+	VERTEX += vec3(1.0, 0.0, 1.0)*vertexWindOffset;
+    // billboarding
+    // MODELVIEW_MATRIX = VIEW_MATRIX * mat4(INV_VIEW_MATRIX[0],INV_VIEW_MATRIX[1],INV_VIEW_MATRIX[2],MODEL_MATRIX[3]);
+}
+
+void fragment() {
+	vec2 timeOffset = vec2(TIME/windSpeedScale);
+	float noiseLevel = texture(noise, timeOffset + worldPos.xz/noiseScale).r;
+	NORMAL = (VIEW_MATRIX * vec4(0.0, 1.0, 0.0, 0.0)).xyz;
+	ALBEDO = mix(color, shade, UV.y) * mix(color, shade, noiseLevel);
+	LIGHT_VERTEX = instance_origin;
+}
+
+ void light() {
+ 	float lambert = clamp(dot(NORMAL, LIGHT), 0.0, 1.0);
+ 	float halfLambert = pow(lambert*0.5 + 0.5, 5);
+    DIFFUSE_LIGHT += halfLambert * ATTENUATION * LIGHT_COLOR / PI;
+ }

grass/grass.gdshader.uid

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+uid://dkvxju1uruobh

grass/m_grass.tres

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+[gd_resource type="ShaderMaterial" load_steps=4 format=3 uid="uid://bpfgcchpiq8wr"]
+
+[ext_resource type="Shader" uid="uid://dkvxju1uruobh" path="res://grass/grass.gdshader" id="1_1atig"]
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_1atig"]
+domain_warp_amplitude = 110.655
+domain_warp_frequency = 0.045
+
+[sub_resource type="NoiseTexture2D" id="NoiseTexture2D_wnfha"]
+noise = SubResource("FastNoiseLite_1atig")
+
+[resource]
+render_priority = 0
+shader = ExtResource("1_1atig")
+shader_parameter/color = Color(0, 0.7518667, 0, 1)
+shader_parameter/shade = Color(0, 0.54901963, 0.34901962, 1)
+shader_parameter/noise = SubResource("NoiseTexture2D_wnfha")
+shader_parameter/noiseScale = 78.52
+shader_parameter/windSpeedScale = 100.0
+shader_parameter/windVertexOffsetScale = 0.126