#version 450

layout(binding = 0) uniform sampler2D backgroundTexture; // Binding 0

layout(location = 0) in vec2 inUV;
layout(location = 0) out vec4 outColor;

void main() {
    //outColor = texture(backgroundTexture, inUV);
    outColor = vec4(1.0, 0.0, 0.0, 1.0); // 输出红色
}