Lightmap on Group of objects

[conor-v]

Does anyone happen to know how to put a lightmap texture on a group with objects? I made a floor from plank models and put it in a group now there must be a lightmap on that group that shows the baked light of the room on the floor

[drcmda]

groups are just containers, only materials have textures.

[conor-v]

and is there anything i can do to get my lightmap on all my objects?