spg-project/resources/fragment.fs

#version 430

layout (binding = 0) uniform sampler3D noiseSamp;
layout (binding = 1) uniform sampler3D textureSamp;

uniform float height;

in vec3 varTextureG;
in vec3 varNormalG;

out vec4 color;

const vec3 light = vec3(-0.746, -0.373, -0.224);

void main(void) {
    vec3 f = texture(textureSamp, (varTextureG + vec3(0.0, height, 0.0)) * 8.0).xyz;
    float l = max(dot(light, varNormalG), 0.0) * 0.7 + 0.3;
    color = vec4(f * l, 1.0);
}