How do I build Shade base on cast by Material but not Mesh ?

Development Rendering
1

I’ve set my material like this , it work fine

set1.jpg
set1.jpg1280×1024 234 KB

But after I build light , the shadow doesn’t looks like it
but the mesh itself , a plane shadow .
how do I do to make material shadow ?

set3.jpg
set3.jpg1280×1024 295 KB

2

Increase the lightmap resolution of the floor mesh.

3

Thanks Jacky , but I found that I solve it by reduced lightmap resolution
Anyway it’s helpful !