This is one for the technically-oriented among you. OLDC (“Online Lighting Diagram Creator”) is an online tool that photographers can employ to create lighting diagrams.
The site gives you ready access to two incarnations of this application. One is named OLDC Lite and it is the one individual users are advised to try out first, whereas the other is titled OLDC Community. As its name implies, that is the one that you will employ if you feel like letting others add your input to what you have created. This is made possible because the diagrams that you come up with are added to a user profile you have created beforehand, and then others proceed to give each original diagram you have uploaded a twist of their own.
All of the services described above are free to begin with. The OLCD Lite and Community versions can be tried at no cost. And users of OLCD Community can create profiles inexpensively, too.
I haven’t gone very far on the actual technical side of either diagram creator because casual readers would be bored. It suffices to say that you can come up with objects and set surrounding light sources. I invite you to explore the site on your own if you feel like learning more about the technical considerations at play.
LightingDiagrams.com In Their Own Words
“The online lighting diagram creator.”
Why LightingDiagrams.com It Might Be A Killer
Photographers can but find it flexible and well-focused – after all, it can be used for free.
Some Questions About LightingDiagrams.com
What paid features are available? 
