I have a lighting problem, the scene is lit and a part or it is unlit, I don't understand why. If I amplify light intensity for example, lit parts of the scene are more lit but the part which is in shadow, is better lighted. There is no shadow mapping implemented in this program, and I even not manage to guess what kind of problem it could be.
This is deferred rendering, so in the image below, the lighting is applied on a texture pixel by pixel, which is applied on a quad.
It doesn't seem to be the number of lights (just 1 present in the scene), I tried with more lights and it is the same problem.
Somebody whould have an idea to understand it ? If you have more questions about this, don't hesitate to ask me !