|Mini-blinds with lined shadows|
|Objects in scene are painted with the shadows|
from the light function
|Blueprint class with plane object and lights built in.|
contains a non-shadowing point light, and shadow casting spotlight
which has the light function defined.
|The blinds photo is added and set to give emissive light,|
there is also a normal map I was testing, more useful when
not emitting light.
|The spotlight near the blinds has a special material|
added as a "light function". This makes the lines masked out.