Cubemap lookup problem

[GArt]

Hello. I want to create a local cubemap and store the normal, depth and radiance values on each face. The values are stored in the cubemap, but I can’t do the correct lookup. Here is the code :

Write to cubemap rendering :
vertex shader

layout(location = 0) in vec3 vertexPosition;
void main() {
  gl_Position = CubeProjection * CubeView * vec4(vertexPosition, 1.f);
  WorldPosition = vertexPosition;
}

fragment shader

layout(location = 0) out vec4 value;
void main() {
  float lightDist = distance(WorldPosition, CubePos) / FarPlane;
  value = vec4(vec3(lightDist), 1.0);
}

Main rendering :
vertex shader

layout(location = 0) in vec3 vertexPosition;

void main() {
  gl_Position = MVP * vec4(ModelPosition, 1.f);
  WorldPosition = vertexPosition;
}

fragment shader

layout(location = 0) out vec4 color;
uniform samplerCube CubeMap;

// cubemap lookup
vec3 fragToCube = WorldPosition - CubePos;
vec3 lookup = texture(CubeMap, fragToCube).xyz;

color = vec4(lookup, 1.f);

Result image :

When I rendered each face of the cubemap, I confirmed that it rendered correctly. However, when rendered with the main shader, it is wrong. I think the lookup to the cubemap is wrong, but I’m not sure why.
Also, when the cubemap initialization is set to DEPTH_COMPONENT, it can be looked up correctly. However, I wanted to store four values, so when I made RGBA.

thanks.