#version 300 es
precision highp float;

in vec2 vTexCoord;
out vec4 fragColor;

uniform sampler2DArray uTexArray;
uniform int uLayer;

void main() {
    float value = texture(uTexArray, vec3(vTexCoord, float(uLayer))).r;
    fragColor = vec4(vec3(value), 1.0);
}