请教各位，当使用镜面反射时，似乎总有点不真实，比如一块地板反射墙上的一幅画，MAX似乎光是计算画到墙的垂直距离然后再镜像一下这个距离而已，它好像并没有计算透视的距离，这样就会产生这样的现象：对面墙上的一幅画在地板的投影有时竞会跑到差不多到这面墙的墙脚来了。不知道是不是这样，请各位指点，谢谢！

会不会是和这有关系
flat mirror必须赋给一个完整的平面

Rules for Using Flat Mirror
Flat Mirror cannot generate reflections correctly unless you observe these rules:

Assign Flat Mirror to selected faces only.

There are two ways to do this. You can make the Flat Mirror material a sub-material of a Multi/Sub-Object material, or you can use the Apply To Faces With ID control.

If you assign Flat Mirror to multiple faces, the faces must lie in a plane.

Non-coplanar faces in the same object cannot have the same Flat Mirror material.

In other words, if you want two different planes of an object to have flat reflections, you must use a Multi/Sub-Object material. Assign Flat Mirror to two different sub-materials, and assign different material IDs to the to different planar faces.

The material ID used by the Flat Mirror sub-material must be unique to the coplanar faces in the object.

If you assign Flat Mirror using Apply to Faces with ID, faces without that ID display the nonreflective components (diffuse color, and so on) of the material with the Flat Mirror reflection map.

用 Raytrace 代替 flat mirror 试试

好吧，谢谢大家的帮忙。