For WaveEngine 2.0 we decided to change our render to allow users to have more control on lighting. The big challenge here was how to offer a better lighting system and still support old mobile devices with OpenGL 2.0.
The render system in WaveEngine 1.4.2 is known in computer graphics as Forward Rendering. It is fast, simple but limited since you cannot use for example more than 4 to 8 lights per object (there are some techniques that try to simulate more lights but do not give good quality), and you need to write a large amount of shaders to support some combinations efficiently.
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