Shadow Map Issues

dawson_john · Sep 2010

So, I'm currently having issues with a small scene I'm creating. In this little greenhouse scene, I've placed a number of large floor tiles. Some of the shadows look okay, but I've noticed that several of the tiles are using the exact same shadow map, and thus creating an effect which looks incorrect.

Is there any way I can force UDK to create a custom shadow map per tile instance, or is there something else I'm doing wrong?

Thanks for any and all the help, folks.

Parkar · Sep 2010

Are the tiles different static mesh instances?

Only way I can think of that would give you this result is if both tiles are part of the same mesh and do not have unique light map UVs.

dawson_john · Sep 2010

There's only one tile mesh, that I'm just using all over the place.

dawson_john · Sep 2010

Any ideas, fellas?

Xendance · Sep 2010

So did you actually duplicate the floor static mesh in the UDK, rather than instance it around in Max (or some other) and then import the whole scene via FBX?

It should work if you just duplicate the same smesh in UDK.

dawson_john · Sep 2010

The ASE I imported is just a single floor tile. I duplicated that single static mesh throughout the level within UDK.

Snight · Sep 2010

Do you have a second UV set for your light map? I've seen a bug a few times where your lightmap will become the "texture" of your objecct if the light map channel is set to 0 and you have a light map size set.

dawson_john · Sep 2010

Yep, they have a seperate UV set just for the lightmap. Textures use set 1, lightmap uses set 2.

Parkar · Sep 2010

This is very strange then. It's obviously using the same light map on all of them.

Do you get the same problem if you create a new map with just theses static meshes and a light source?

kdm3d · Sep 2010

I hate to suggest the obvious... did you rebake the lighting after duplicating them around?

AndrewD · Feb 2014

I have recently encountered this problem, any solutions?

Shadow Map Issues

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