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.

learn more… | top users | synonyms (1)

0
votes
0answers
45 views

Only one side of the object reflects light while in the shadow

in my scene I have a plane as a floor and a plane as a building next to it, my directional light is rotated to make the building cast shadow on the road. I placed a few cubes on the road, the building'...
0
votes
0answers
85 views

LibGDX Box2DLights - Global Illumination

I'm using LibGDX + Box2D to create dynamic lights in my game, but I'm currently stuck. I'm trying to light up every game object in the game with its own shadow, kinda like global illumination. Do you ...
2
votes
1answer
56 views

Polygon edges visible when using per-fragment lighting (OpenGL)

I have created a mesh in Blender (just a sphere with a texture over it; it's supposed to look like mars) and I've exported it as OBJ. I've tried it both with exporting with normals in Blender's export ...
0
votes
0answers
114 views

Unity baked lighting having noisy lightmaps

I am baking a spotlight into my scene. It is made using modular assets. For some reason it is having noisy lightmaps. Shadows are occuring where there shouldnt be any. What am I missing? I am using ...
3
votes
1answer
176 views

How do 2D volumetric lights work?

Context So in my current project (written in Java using LWJGL / OpenGL, so GLSL for shaders) I added lighting quite a few months ago, which was already an interesting challenge, having never done ...
17
votes
4answers
2k views

How can I make particles glow and cast light on its surroundings?

Im currently attempting to make a firefly effect on a dark forest. The level has very low light and the player is one of the few light sources. To let the player see the level better, I am attempting ...
1
vote
0answers
36 views

Direct3D11: Directional Shadow Maps

I've recently implemented shadow maps on my project. However, I'd like to add a feature that allows the light direction to be dynamically changed, so that the terrain can be viewed using different ...
6
votes
1answer
315 views

How do I properly light characters in a Unity scene?

I made a game prototype and want to improve some of rendering the visuals through light baking (which I'm new to). While I was mostly able to do this in my environiments, I'm having issues doing this ...
1
vote
0answers
84 views

Point Light shows black box & rect (PointLight not working) - libgdx 3D

I am creating a 3d scene currently a box and rect, and trying to enable lighting. When i create a PointLight and add it to Environment everything turns to black color? all i want to do is ...
2
votes
2answers
92 views

How do I implement a flashlight in SDL2?

I'm a beginner trying to implement a flashlight in SDL2, but can't figure out a good way to do it. I've found a way to manipulate the background's color; changed it to dark and back to its normal ...
2
votes
0answers
46 views

Problem with baked lights

I'm working on a 3D gallery experience and I'm having some difficulties regarding directional and point baked lights. When I build it for web with webgl, only global lights are rendered, but when my ...
1
vote
0answers
295 views

Unity 5 lighting broken

EDIT: I've discovered the cause of the problem and it might make more sense if I continue in another question. To start with unity has decided that lighting inside reflection probe bounding boxes is ...
2
votes
1answer
67 views

Efficient Per-Tile Lighting Technique

Quite a few of the 2D games that I have seen use per-tile lighting, where each tile has a set brightness (continuous scale of 0 to 1, for example). One way of calculating the brightness of any one ...
3
votes
1answer
494 views

Why are there no dynamic shadows in UE4?

So my problem is that other than for static objects which have baked shadows from building lighting, there are no shadows for movable objects, like those cubes. Neither from the Light source actor, ...
1
vote
1answer
199 views

How to combine tiles in a procedurally generated level in 2D tile based maps?

I am developing a 2D tile-based top-down game. It is currently instantiating square objects with a sprite renderer to procedurally generate the map. Each floor and wall is a 1-unit wide object. I ...
2
votes
1answer
76 views

Calculate angles between two other angles

I am trying to implement a FOV for my light casting algorithm. In the diagram below each white line represents a ray cast from a std::vector<float> of normalized radians. How can I only include ...
1
vote
1answer
167 views

Unity — custom shader behaves differently on WebGL deployment (correct) and editor view (incorrect)

I started working on shaders and lighting on Unity3D 5.2.1f1. I set up a scene where the sun object rotates the directional light (the only light in the scene) based on its position to simulate a ...
1
vote
1answer
126 views

Java Slick2d lighting using Raycasting

I am trying to make a top down view game in java using the Slick2d library, for lighting I wanted to do something like this : http://www.redblobgames.com/articles/visibility/. I was wondering if there ...
1
vote
0answers
85 views

How to make lens flare ignore layers work with first person character in Unity 5?

I have a simple lens flare on my directional light (sun) and I would like the flare to only be visible when the sun is directly visible, naturally...But right now with the default ignore layers, the ...
1
vote
0answers
69 views

Trouble creating fog and lighting in unity

I am trying to create a model in unity that looks like this picture by Escher I can create the lattice, however, I can not create the fog and background/lighting effect. When I adjust the fog in ...
3
votes
2answers
812 views

Unity 2D Alpha cutout layer for Sprites

I'm trying to make a simple Fog of War effect for my 2d game, similar to these: . I want to have a sprite layer of black and then have a sprite to cut out itself from the black layer, leaving a ...
2
votes
2answers
408 views

How to fix flare in unity?

I have a simple sun flare that I would like to appear on my directional light (sun). However I cannot see the flare, I have tried setting the ignore layers to everything and checked and double checked ...
16
votes
1answer
2k views

Phong lighting - there is something very strange with specular lighting

I implemented Phong lighting. Everything seems to work - torus and spheres are lighted as expected, etc. But I notices something strange regarding specular lighting of directional light. Here are two ...
2
votes
1answer
91 views

How to remove voxel lights with Minecraft-style algorithm?

I am making a voxel game. I have researched lighting techniques, and the minecraft-style algorithm appears the most efficient. When blocks are placed, they are marked for update. The engine performs a ...
2
votes
1answer
72 views

Check if .dds texture is gamma-corrected

How can I check if .dds texture is gamma-corrected? It seems to be gamma-corrected since after manual gamma correction in fragment shader image is too bright. But I wanted to be sure.
1
vote
1answer
321 views

Unity 5 - Textures look strange in Deferred Rendering

I've created an exterior terrain scene in Unity 5 which features lots of trees and grass but some textures look awful and I'm wondering why. Please see the attached image: This texture problem is ...
4
votes
1answer
528 views

Memory-Efficient, Optimized Terraria-Like 2D Lighting

I am working on a terraria-clone and I am aiming for it to be able to be run on most Android devices. I am able to generate a world, jump around, etc but I am not looking to add in some efficient ...
2
votes
2answers
1k views

How to achieve lighting like this in Unity for 2D games?

How could I accomplish a lighting effect something similar to this game?: I'm not talking about the shadows but about the glowing/lighting effect on the crystals and the torches. Anyone got any ...
4
votes
1answer
311 views

deferred tiled lighting

EDIT I have discovered that it does not seem to be the lighting calculation but the culling code because when i draw the lights without the culling it works perfectly. I have been attempting to ...
0
votes
0answers
82 views

Offscreen frame buffer lwjgl

I want to create simple 2d lighting. So my idea is to render everything on the default buffer and then apply light mask. For the light mask i want to use frame buffer which later i will apply on the ...
0
votes
2answers
158 views

2D TileMap smooth lighting

I want to implement (a smooth) lighting into my 2D Maps. I want to have the basic idea. What I thought of is 2 components. The Scene's Ambient light: The Tiles and Sprites are tinted into this colour ...
2
votes
0answers
79 views

Instancing meshes messing up scene lighting

I've been rendering a scene (some objects over a large field of grass) to test shadow mapping which is working fine. But when I use instancing to "gain" performance, I not only get a decrease in ...
1
vote
3answers
1k views

Unity LoadLevelAdditive and baked light scene settings

I am a programmer for a small game. For our levels, I separated the UI from the level data, so one scene is a scene which contains only the UI, the other scene has all the gameobjects and models and ....
2
votes
2answers
95 views

Shading a 2D visibility mesh to act like a light?

I have a visibility mesh made by raycasting: https://my.mixtape.moe/omjlgr.webm Right now, I'm using a shader to color the mesh white and fall off with distance and radius (the texCoord in this case ...
2
votes
1answer
560 views

How to create 2D shadows and lighting?

How do I create shadows and lights in a 2D top down perspective game? I want to achieve an effect similar to this game (also made in unity) where some objects like a torch, different sprites, and the ...
1
vote
0answers
27 views

My Directional light lights the floor of my cave but not the ceiling (concave mesh)

I am developing a small demo with Meshes created from a vertex map. When i put a hole in the mesh (making it concave) the physics work fine but the directional lightning only lights one part of the ...
2
votes
1answer
810 views

JS Canvas - Creating 2D Game lighting effect like Terraria

I just started working with canvas in HTML5 and with javascript. I'm pretty satisfied with my game so far: http://xenopal.dk/game-v1.1/. But I'd like to implement lighting as well in the style of ...
10
votes
1answer
317 views

How can I implement lights & shadows in a multi-layer 2d tilemap?

I am in the process of writing an isometric game from scratch, and I'd like to know how/if I can add lights and shadows. The code I have so far can be found here, but it should be enough to know that ...
2
votes
1answer
50 views

Calculating the illumination level of an object

In my (UE4) scene I have an object and several (point) light sources. The object can move around, getting closer and away from all those light sources. Now I need to calculate for each light source ...
2
votes
1answer
1k views

Creating Fog Of View in 2D game with lighting method

I'm creating 2D side scrolling game with Unity, and i want to add feature where the player come into a cave, then all going dark, the player turn on the flash light, so the player can see around ( ...
0
votes
1answer
48 views

Ray tracing - texture and phong lighting

Other questione releated to my ray tracer implementation for iPad. If I have a polygon that has a texture and a material, how do I calculate the color using Phong lighting model? Is the texture used ...
2
votes
1answer
57 views

How to correctly pass multiple light structures to shader stage?

I'm having some problems when passing multiple light structures to a shader stage. I'm using an array of point lights that is updated each frame. This is my code for creating the buffer ...
0
votes
0answers
120 views

Unity - Meta pass and Precomputed Realtime GI

I am writing a shader in Unity and I would like to use some special values for the precomputed realtime GI. I am using a vertex fragment shader as it seems that it offers much more controls than a ...
0
votes
0answers
23 views

UDK building light takes a long time

I have been creating a level in UDK and usually bulding lighting takes 10 minutes to build but today i haven't changed anything in the level, now it takes 20+ minutes, why is this happening?
1
vote
0answers
22 views

Is there a way to control the ordering and grouping of ShaderLab Blend command?

I'm writing a shader in Unity that responds to 3 lights: 1 directional and 2 point lights. The point lights are processed in the ForwardAdd pass (once per light). I need the ForwardAdd pass to blend ...
3
votes
1answer
140 views

Skydome and Ambient Intensity (Unity)

I've made a custom skydome in my game. For all my lights I have set them to not affect the skydome. The only thing affecting the skydome is the ambient light. For my game I have ambient intensity at ...
3
votes
3answers
1k views

2D - Smooth lighting with shadows for a tile-based game

for the last week or so I have been completely stuck on trying to implement efficient lighting. I've been researching and experimenting and I've looked everywhere that I have been capable of finding, ...
17
votes
3answers
1k views

How can I model a star?

I'm trying to model a star in Unity, and it, sort of works, but it's not ideal. Currently, I'm using a large sphere with a self-illuminating material containing a star texture applied to it's surface, ...
2
votes
1answer
120 views

How do I query a LibGDX Box2DLights “light” and “dark” regions?

I have lighting implemented using Box2dLight. I want to update/render things inside the player's PointLight area. Stuff in the dark area should not be rendered. How can I find which areas are lit or ...
0
votes
1answer
64 views

Phong lighting model - R vector

In Phong lighting model a vector R is used to calculate the spectral component of light. The equation used to obtain it is R = 2(N•L)N - L I can't understand why we use this equation. Could someone ...