sd-webui-3d-open-pose-editor/style.css

#openpose3d_iframe {
    display: block;
    width: 100%;
    height: calc(100vh - 150px);
    min-height: 750px;
}

/* Workaround for ashen-sensored/stable-diffusion-webui-two-shot */
#openpose3d_main .output-html {
    display: block;
}