写实三维渲染，方形画幅，中景平视视角，深灰色哑光纯色背景，画面中央摆放一件圆柱形做旧竹制笔筒，整体为深棕褐色，表面带有清晰天然竹纹理与使用磨损的浅淡痕迹，上下环形口沿边缘露出浅黄褐色竹胎，笔筒外壁带有浅浮雕雕刻的兰草纹样，包含舒展弯曲的兰叶、分叉的兰枝、两朵盛放的兰花、底部山石凹凸纹理，侧方柔和柔光打亮筒身，浮雕阴影自然柔和，整体氛围沉稳雅致，质感厚重古朴。

Realistic 3D rendering, square frame, medium shot eye-level angle, dark gray matte solid background, a cylindrical aged bamboo pen holder placed in the center of the frame, overall dark brown color, surface covered with clear natural bamboo textures and faint traces of wear from use, the edges of the upper and lower circular rims expose light tan bamboo base, the outer wall of the pen holder features shallow relief carved orchid patterns, including spreading curved orchid leaves, branched stems, two blooming orchids, and uneven rock textures at the bottom, soft side light illuminates the holder body, the relief shadows are natural and soft, the overall atmosphere is calm and elegant, with a heavy and simple texture.