So basically I have seen this question alot on the internet but non of the ones I have seen was answered so Iam going to ask again in hope that there is a solution to this problem .
As the title says , Iam trying to render an interior scene in blender with luxrender and behind the window I going to put an image of a city , the problem is I dont know how to do that in lux although I know how to do it in both cycles and blender internal .
Usually the way this problem is tackled is by these steps :
1- make a plane with the background texture .
2- make the plane material shadeless .
3- Allow light to ignore the plane so it passes through it . ( to prevent it from blocking sun lamp )
4- put it behind the window ( glass or not ) .
The problem for me is in step 2 and 3 in Lux , as I dont know how to make a shadeless material or how to allow light to pass through an object .
I know that this due to that Lux is physically accurate and such things dont exist in real life , but I have seen many Lux results by people containing backgrounds .
Also there were alot of people mentioning to use HDRI as backgrounds but this doesnt solve step 3 and HDRI in Lux cannot be scaled ( I think ) and I cant move them to be in an appropriate position making it an avoidable option .
Iam using both the latest blender (2.76) and Lux (2.5) versions as of now , hope someone could answer my question and thanks in advance .
