The simulation of light and illumination in games, including its interaction with the environment. A core element of games that can bring out vivacity into otherwise static worlds.

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11
votes
3answers
9k views

Trying to understand light on Opengl, how to simulate a realistic sun light?

I don't know if I'm doing something wrong or missing anything but I want to simulate sun light, like in a sunny day. When the object is facing the directional light, it's well lit and there's no ...
17
votes
1answer
7k views

What does it mean to “bake lights”?

What does it mean to bake lightmap ? I heard this in Unity3d, and again found this LightUp plugin for sketchup that bakes lightmap. From what I observe, the lightmap baked gives the 3d object a much ...
8
votes
4answers
2k views

Any good book on lighting in video games?

Lighting plays a fundamental role into videogames. A videogame without a good ilumination is flat and without life. I'm looking for a book that explains how must be iluminated a scene and what factors ...
18
votes
3answers
2k views

How can I create a lighting effect like this?

This is the most beautiful 2d lighting I have ever seen, and I'd like to perform lighting like this too. How do I do it? I don't care about the physics or how the particles are simulated - I only ...
1
vote
1answer
303 views

Materials when rendering geometry

When specifying the material (ambient/diffuse/specular) for use in lighting calculations, what level of detail is the material specified at? Per vertex, mesh, bone?
3
votes
1answer
532 views

Multiple volumetric lights

I recently read this GPU GEMS 3 article Volumetric Light Scattering as a Post-Process. I like the idea to add volumetric light property to realtime render i'm working on. Question is will it work for ...
6
votes
3answers
1k views

Common light map practices

My scene consists of individual meshes. At the moment each mesh has its associated light map texture, I was able to implement the light mapping using these many small textures. 1) Of course, I want ...
5
votes
3answers
4k views

How do I fix this weird lighting problem?

I'm making a small game in Unity, and some models are displaying very ugly shading. The shading usually looks funky along the edges between triangles. I'm pretty new to working in 3D; I bet this is ...
8
votes
1answer
279 views

Is there any difference between storing textures and baked lighting for environment meshes?

I assume that when texturing environments, one or several textures will be used, and the UVs of the environment geometry will likely overlap on these textures, so that e.g. a tiling brick texture can ...
1
vote
2answers
2k views

why specular light is not running?

i'm on JOGL this is my method for lighting: private void lights(GL gl) { float[] LightPos = {0.0f, 0.0f, -1.0f, 1.0f}; float[] LightAmb = {0.2f, 0.2f, 0.2f, 1.0f}; float[] LightDif = ...
8
votes
4answers
680 views

I need help with 3d shading/lighting

How do you guys handle shading in a 3d game? I have a directional light source that shades one side of a tree made of cubes. The remaining 3 sides all get ambient shading only. So the 3d effect is ...
1
vote
2answers
717 views

Getting a black scene with XNA, what am I doing wrong?

I'm new to XNA (ver 4) and I'm obviously doing something wrong but I don't know what. So far I have managed to model my scene (quite simple, just a bunch of squares which are calculated--there are no ...
9
votes
3answers
3k views

Lighting in a Minecraftian World

Minecraft is a game that is largely based on a heightmap and uses that heigtmap information to flood the world with light. From my understanding the highest point in the heightmap is the end of the ...
4
votes
2answers
1k views

Blending 2d images to subtract alpha

I'm looking into doing a 2d lighting system with a result similar to this: http://forums.tigsource.com/index.php?topic=15619.0 This thread I believe disregards color, as well as doesn't really list a ...
3
votes
1answer
603 views

How to create a simple “spot light” effect with Sdl or Sdl.Net?

i'm wondering: how to create a simple "car headlight" (for i.e) or a torch spotlight in Sdl or Sdl.NET ? Does anyone know how ? Thanks
2
votes
2answers
2k views

2D Real-Time shadows on level on a level made from a Dynamic Bitmap

The Bitmap has transparency, and only non-transparent pixels are solid and used for hit detection for the physics engine and gameplay. I have seen some versions done with convex hulls, but for ...
46
votes
4answers
20k views

How is 2D lighting implemented?

I am wondering what the best way to approach a "lighting" effect in 2D games is. For instance, if my main character is glowing, what techniques can I use to complete the visual effect of the character ...
4
votes
2answers
1k views

Lighting Objects with Textures - OpenGL

I'm trying to get lighting effects on a textured object; I'm using .obj and .mtl files to define them. No matter what I try my object is either invisible, unlit (plain texture), or completely white. ...