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Hey raj!
A more realistic lighting model like you'd get with Unity or Unreal Engine 4, which both do this by utilizing physically based rendering, is not implemented in Vizard. But there's the possibility to write your own shader code. The support gave me this answer a while back:
»If you're using the effects framework you need to use the GLSL version released with OpenGL 2.0. If you write your shader from scratch then you can declare the GLSL version you want to use.«
So you see, it's a really old OpenGL implementation that Vizard uses and the shader code is outdated, which makes it hard to find helpful code reference on the internet.
I tried implementing some PBR shading, but didn't had the time to finish the project.
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