why is light not appearing on one part of the wall?

[rfollett]

I have created a thin surface to get a light wash effect onto a large backdrop on a stage.
for some reason the light is not appearing on the black of the jpg?  is this down to how I created the jpg?
RGB 8 bit..

[rfollett]

I would love to understand this.. what have I done wrong with the black to make it not work in keyshot?

[Esben Oxholm]

Hi Richard.
Do your material have any specularity? If not, adding that should help.

[mattjgerard]

In my use, pure 100% black texture maps are difficult to get any optical response from, so if I have say, a black label going on a product I make it a dark grey in  illustrator or PS first, then it will respond with reflections and spec in the materials. For some reason pure black just doesn't react the way I want it to.

[rfollett]

thank you. in the end I applied black hard plastic to the object and then applied decal/jpeg on top .. then it worked ok.. it did not like the texture coming direct from rhino. i apprciate all your help