Baking vray materials to texture

When I try to bake textures with vray material it doesn’t work. I tried baking a vraydirt map but I had to put it in a standard material and then adjust the vray camera exposure to get the material right. Is it possible to add it to the wislist? thanks.

instead of adjusting the vray camera, adjust the vraydirt settings while looking at the diffuse render element - and then bake?

The dirt map is pure black and white. but my render was grey until I increaed camera exposure.

This is in the viewport render or in the baking render? are you using DR?

If I drop a vray material with vray dirt in the diffuse, onto a teapot - it renders to texture fine as long as you choose the VRayDiffuseFilterMap element