Set up the Blur Buffer

    // Create two texture objects to ping-pong blur 
    glGenTextures(2, blurtex);
    glActiveTexture(GL_TEXTURE2);
    glBindTexture(GL_TEXTURE_2D, blurtex[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGB32F, bloomBufWidth, bloomBufHeight);

    glActiveTexture(GL_TEXTURE3);
    glBindTexture(GL_TEXTURE_2D, blurtex[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGB32F, bloomBufWidth, bloomBufHeight);

    // Bind tex1 to the FBO
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, blurtex[0], 0);

    // Unbind the framebuffer, and revert to default framebuffer
    glBindFramebuffer(GL_FRAMEBUFFER, 0);