How to use

getLayer

method

in

com.jme3.texture.FrameBuffer$RenderBuffer

public void updateRenderTexture(FrameBuffer fb, RenderBuffer rb) {
  Texture tex = rb.getTexture();
  Image image = tex.getImage();
  if (image.isUpdateNeeded()) {
    // Check NPOT requirements
    checkNonPowerOfTwo(tex);
    updateTexImageData(image, tex.getType(), 0, false);
    // NOTE: For depth textures, sets nearest/no-mips mode
    // Required to fix "framebuffer unsupported"
    // for old NVIDIA drivers!
    setupTextureParams(0, tex);
  }
  if (rb.getLayer() < 0){
    glfbo.glFramebufferTexture2DEXT(GLFbo.GL_FRAMEBUFFER_EXT,
        convertAttachmentSlot(rb.getSlot()),
        convertTextureType(tex.getType(), image.getMultiSamples(), rb.getFace()),
        image.getId(),
        0);
  } else {
    glfbo.glFramebufferTextureLayerEXT(GLFbo.GL_FRAMEBUFFER_EXT, 
        convertAttachmentSlot(rb.getSlot()), 
        image.getId(), 
        0,
        rb.getLayer());
  }
}

public void updateRenderTexture(FrameBuffer fb, RenderBuffer rb) {
  Texture tex = rb.getTexture();
  Image image = tex.getImage();
  if (image.isUpdateNeeded()) {
    // Check NPOT requirements
    checkNonPowerOfTwo(tex);
    updateTexImageData(image, tex.getType(), 0, false);
    // NOTE: For depth textures, sets nearest/no-mips mode
    // Required to fix "framebuffer unsupported"
    // for old NVIDIA drivers!
    setupTextureParams(0, tex);
  }
  if (rb.getLayer() < 0){
    glfbo.glFramebufferTexture2DEXT(GLFbo.GL_FRAMEBUFFER_EXT,
        convertAttachmentSlot(rb.getSlot()),
        convertTextureType(tex.getType(), image.getMultiSamples(), rb.getFace()),
        image.getId(),
        0);
  } else {
    glfbo.glFramebufferTextureLayerEXT(GLFbo.GL_FRAMEBUFFER_EXT, 
        convertAttachmentSlot(rb.getSlot()), 
        image.getId(), 
        0,
        rb.getLayer());
  }
}