Need help with whiteboard material and strange splotches

[restoeboemi]

Hi, i need help to make a whiteboard material.
for rite now, im using vraymat, pure white diffuse and reflection with fresnel checked, but it doesnt seem to work.(Blue mark) Anybody can help?

And there's strange black splotches(red mark).the room is an editable poly. no raytrace and anisotropy mat. how to get rid of this?

[natty]

put an output map in the diffuse slot ... should do the trick

[restoeboemi]

thx natty, it works.
for the splotches, assign a 2 sided mats and its gone.

[natty]

nice one