硬光

相對主體較小的光源形成清楚陰影邊界，突出結構和紋理。

提示詞

Use Hard Light: a small directional daylight source from the existing left window creates crisp-edged cast shadows from the existing character onto the floor and across its own arms and belly. Emphasize sharp light-to-shadow boundaries and existing cracked patchwork relief without changing brightness indiscriminately. Keep the window and all geometry unchanged. Do not introduce a window-grid projected pattern; demonstrate the hardness of the character shadows.

文字：fuse 技法研究 · 示範：fuse 內部生成素材（角色 Ruk · 背景畫室與左窗）

其他技法

分割線會自己來回移動。把游標移上去就會停下來，這時可以自己拖。

效果對照

基準圖裡，Ruk 腹部與畫室地面的陰影較柔和。硬光版本讓左窗方向的亮面與暗面交界更銳利，角色在地面上的投影也有清楚邊緣。拼貼表面的起伏因而更突出，觀察重點是陰影的邊界與結構。