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.
6
votes
2answers
75 views
Why is the distance from object to eye irrelevant in illumination models?
For example in Phong model and Blinn model, the light intensity does not change depending on how far away the camera is. Why is that?
1
vote
0answers
30 views
Doubts with results of per-vertex lighting shader
I'm researching simple shaders to add to my DirectX 11 project such as a per-vertex diffuse shader plus specular reflection component.
I'll begin with the results:
Seems specular reflection is ...
1
vote
1answer
41 views
How can I achieve a flickering torch/candle effect in 2D?
I'm currently working on a 2D lighting system that has point lights effectively rendered as a quad in a top-down 2D view, something like this for each light:
I'd like to achieve a somewhat ...
0
votes
0answers
30 views
Light only passes through static mesh when selected - Unreal Engine 4
I just started working with UE4 and this issue has been bothering me for a couple of nights now. There are two questions regarding this problem on Unreal AnswerHub, but none of them offers a solution.
...
1
vote
1answer
57 views
How to create realism similar to scenes rendered in Vray?
I am tasked to make a game which requires very realistic interior scenes. Unity's bedroom demo(http://blogs.unity3d.com/2015/11/10/bedroom-demo-archviz-with-ssrr/) really caught my eye. See I know how ...
1
vote
2answers
68 views
Achieve a red lighning effect in unity for a 2d game
Effect that im refering to:
http://youtu.be/jaBY83WvS3M#t=05m36s
How could I achieve this kind of red lightning/flashing/shadowy effect in Unity3D for a 2D game? I'm trying to think of a way but I'm ...
0
votes
0answers
62 views
2d Lighting over Sprites in C#
I am currently working under a project , a small application where i have to implement 2d lighting . For example , in the GDI+ canvas , a image will be drawn and i will have to put a lighting effect ...
-2
votes
2answers
97 views
How do I properly combine the colors of different lights?
Let's say I have 4 light colors:
(0.6,0.0,0.0), (0.0,0.6,0.0), (0.1,0.1,0.1), (0.1,0.1,0.1)
And now I want to combine them properly. I can't add them together, because if I add for example 3rd ...
0
votes
0answers
86 views
Weird squares everywhere
So in unity I have some weird squares on surfaces of certain objects, which are buildings represented by planes:
I don't know what causes it, I tried changing some settings in lighting and ...
0
votes
0answers
46 views
How to darken certain parts of my scene, Unity3D
I'm trying to darken certain parts of my Unity3D scene (an enclosed room to be specific). I've tried researching this, but couldn't find anything. I've read that using Lightmapping and Light Probes ...
3
votes
1answer
55 views
2D deferred lighting calculations not working
I have the following code for my HLSL pixel shader. Modified from another post here on GameDev (Link), but I have a few problems with it:
// calculate UV and get texture and normal.
float2 UV = ...
0
votes
1answer
29 views
SVD vs Normal decomposition for BRDF compression
In the slides over here by NVidia, they describe methods for BRDF compression. They first create a BRDF matrix where each column(or row) corresponds to a single light direction (or outgoing view ...
4
votes
1answer
34 views
Ray tracing - BRDF using Cornell measured spectral data
I wrote a ray tracer that implements various BRDF models (Oren Nayar, Lamber, Torrance Sparrow and so on).
Now I'm trying to implement a BRDF from measured data.
I choose the Cornell database data ...
6
votes
2answers
847 views
Where to cast light/shadows in a 2.5D view?
I'm working on a tile-based 2D pseudo top-down/side-on game very much in the graphical style of Prison Archiect. More specifically, I'm referencing their style of drawing wall tiles where you can see ...
2
votes
0answers
57 views
Would this 2D Lighting and Shadows implementation work? [closed]
I'm writing a top-down 2D tile-based game and I'm trying to decide on how to implement lighting and shadows. The game will have a large number of light sources, some static and some moving around the ...
1
vote
1answer
41 views
OpenGL ES 2.0 facet lighting
I am trying to figure out if there is a way to achieve facet lighting in OpenGL ES 2.0 without extensions. I know it is possible if I don't used indexed vertices but I don't really want to do that ...
2
votes
2answers
105 views
What is the difference between PBR and SSR
I am very new to game development and I have been trying to understand the difference between Screen Space Reflection and Physically Based Rendering.
I have read about PBR, and from what I ...
0
votes
1answer
21 views
Lights appear when run in the player although Editor playmode seems to be dark enough [Unity 5]
I've removed all the lights in my scene and the ambient lighting. It works fine in the editor play mode but when I run it on my Android or as a standalone player a light source appears.
The light ...
2
votes
1answer
76 views
How can I make a ball glow and cast light?
I want to make my ball glow and cast light on other objects in the scene.
The scene is generated at run time so I believe baking is out of the question.
Emission materials work only when the object ...
0
votes
0answers
24 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 ...
0
votes
0answers
46 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
52 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
37 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
0answers
83 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 ...
16
votes
4answers
1k 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
30 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
129 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
57 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
82 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
38 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
129 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
46 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
198 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
96 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
61 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
109 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
79 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
52 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
48 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 ...
2
votes
2answers
429 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
196 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 ...
15
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
81 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
56 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
0answers
162 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
459 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
450 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 ...
3
votes
1answer
176 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
50 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
140 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 ...
