Make the Water Line Darker v1.0
This is a very one-dimensional shader. It figures out how high it is in the world and then makes everything below that line darker and shinier.
I had some issues with this shader popping in and out. I had to use a custom AABB on the mesh to make the GPU think the mesh was much larger, therefore culling it further “off screen”. If you have that issue, just give me a holler and we can figure it out.
- Made in GODOT 4.3.
- Designed to be used in the “MATERIAL_OVERLAY” property on a mesh instance. That way you can do your usual texturing underneath it. (see screenshots)
- The math is whatever I could get to work. I’m sure there’s a better way to use it. Feel free to mess around with it.
Shader code
shader_type spatial;
render_mode blend_mul; // darken whatever texture you already have set up on the mesh
//I know some of you didn't read the description, so here's what you need to know:
// Made in GODOT 4.3.
// Designed to be used in the "MATERIAL_OVERLAY" property on a mesh instance. That way you can do your usual texturing underneath it.
// The math is whatever I could get to work. I'm sure there's a better way to use it. Feel free to mess around with it.
//Variable declarations.
uniform float water_sharpness: hint_range(0.0, 1.0) = 0.45;
uniform float height_modifier = 2.0;
uniform vec3 darkening_color : source_color = vec3(0.1,0.2,0.2);
uniform vec3 source_color_modifier : source_color = vec3(1.,1.,1.);
uniform float max_metallic: hint_range(0.0, 1.0) = 1.0;
uniform float max_specular: hint_range(0.0, 1.0) = 1.0;
varying vec3 pos;
//Find the Y POSITION in the world (water is usually flat).
void vertex() {
pos = mat3(MODEL_MATRIX) * -VERTEX;
pos = pos - NODE_POSITION_WORLD;
}
//use the position to determine the color change, the metallic, and the specular.
void fragment() {
ALBEDO = mix(vec3(1.,1.,1.), vec3(0.1,0.2,0.2), clamp(pow(pos.y+height_modifier, water_sharpness), 0., 1.));
METALLIC = clamp(pow(pos.y+height_modifier, water_sharpness), 0., 1.);
SPECULAR = clamp(pow(pos.y+height_modifier, water_sharpness), 0., 1.);
}
