Projection Mapping on Dinosaur Exhibits: Content, Surfaces and Pitfalls | 恐龙展投影映射：内容、载体与常见坑

Projection starts with the surface

Mapping is only as good as the object it lands on. Deep seams, glossy paint and moving parts all fight the projection. If the sculpture is being built for mapping, agree the finish early: matte, light-toned and without sharp relief where possible.

Place projectors before the content exists

Throw distance, lens choice and the audience sightline decide the image more than the render does. Lock the projector positions and the viewing cone first, then design content inside those limits. Content designed without them usually needs rebuilding.

Write content for a fixed viewpoint

Mapping on a dinosaur is not a wraparound screen. Visitors approach from a limited arc, and the illusion is strongest from the designed viewpoint. Plan the reveal, the animation and the exit around that arc instead of spreading detail evenly across the model.

Calibration is a schedule item

On-site calibration always takes longer than expected, especially with moving animatronic parts. Budget a real session with the actual content, the actual lights and the actual ambient brightness. Night-time venues and daylight venues need different answers.

Plan the failure case

Projectors get hot, lamps age and a single cable can take the show down. Decide what visitors see if one projector drops, and make sure the scene still reads. A graceful fallback is part of the design.

DinoCG coordinates sculpture finish, animatronic motion and projection content so the three do not fight each other on opening night.

Chinese Version

投影先看载体

映射效果的上限由被投影的物体决定。深缝、亮面漆和运动部件都会干扰投影。如果雕塑就是为映射而做，请提前约定表面工艺：哑光、浅色、尽量避免过锐的起伏。

先定投影机，再做内容

投射距离、镜头选择和观众视线，对最终画面的影响大于渲染本身。先把投影机位置和可视范围锁定，再在这个范围内设计内容。不按范围做的内容，通常要重做。

为固定视角写内容

恐龙映射不是环幕。观众从有限的弧线靠近，错觉在设计的视点最强。围绕这条弧线安排出现、动画和退场，而不是把细节平均铺满模型。

校准要排进工期

现场校准总会超时，带运动部件的仿真恐龙尤其如此。要预留一段用真实内容、真实灯光和真实环境亮度做的调试时间。夜间场馆和日间场馆需要不同方案。

准备失效方案

投影机会过热，光源会衰减，一根线缆就能让演出停摆。要决定单台投影失效时观众看到什么，并保证画面仍然成立。可接受的降级方案本身也是设计的一部分。

DinoCG 把雕塑表面、仿真动作和投影内容一起协调，避免三者在上线当晚互相打架。