I have photos of LEGO scenes with several objects, walls, surfaces etc. in them. Currently, there are no lights in the scenes, except for the lapms that light the scene from outside. The goal is to add glowing objects like computer screens, lamps etc. that are inside of the scene.

Since I don't have real miniature lamps and lights, I would like to simulate the effect that added lights and lamps would have on objects. For example, how is the face of a Lego minifigure affected by the glowing of a blue screen in front of it?

I am not aiming at perfect results (no physically correct phong/reflection/caustics etc.), rather at methods that yield reasonable approximations of glowing and reflection effects. My tools are Gimp, Inkscape, Krita, ImageMagick, POV-Ray and Linux scripting knowledge.

At the moment, I am thinking of adding coloured, semi-transparent layers to selected areas of the images, but maybe there are graphic or painting "tricks" available, that give good results.

Any help is appreciated!

  • What's the question?
    – Ryan
    Jul 20 '16 at 14:17
  • 3
    I think the OP"s question is answered by Filters>Light and Shadows>Lighting effects and especially by the "Environment map" tab.
    – xenoid
    Jul 20 '16 at 17:33
  • Thank you, @xenoid, for your comment. I admit, my question is not very clear, but you guessed correctly: Bump map or Environment map allow to brighten only parts of an image, namely the surfaces that point towards the light source. Color and other properties can also be selected. This seems to be an excellent solution! If you make this an answer I would accept it.
    – Aziraphale
    Jul 20 '16 at 20:16
  • As soon as @Ryan unlocks it :)
    – xenoid
    Jul 20 '16 at 23:05
  • there you go @xenoid
    – Ryan
    Jul 20 '16 at 23:06

Have a look at Filters>Light and Shadows>Lighting effects and especially at the Environment map tab (which is a picture whose tints are reflected in the object). You may also want to add a bump map to help create the right shadows.

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