NewLight Spot

newLight_Spot is a point entity available in Black Mesa. It is a cone-shaped, invisible deferred light source, includes lightcookies with animations for them. The animations is based on row and column atlases or scroll mode.

Class hierarchy
CNewLightSpot ↳CBaseEntity

NewLight_Spot in bm_c4a1b (used for the floodlight).

Note:You can have only 256 spot light entities placed in the map editor.

Todo: Update issues, rework page.

Keyvalues

Name (targetname) <string>[ Edit ]

The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g. parentname or target).
Also displayed in Hammer's 2D views and Entity Report.

See also:  Generic Keyvalues, Inputs and Outputs available to all entities

ReverseDir (ReverseDir) <choices>

By default, the Y angle for a spot light is inverted, which causes the light to point upward when pointed downwards. This option allows you to fix this problem.

• 0: No
• 1: Yes

Important:This additionally impacts performance, use it in rare cases (for moving with NPC flashlight, etc), It is much better to invert required Y angle value (make it from 90 to -90 for example).

Examples

ReverseDir - No (Pitch Yaw Roll (Y Z X) - 90 0 0) ReverseDir - Yes (Pitch Yaw Roll (Y Z X) - 90 0 0)

Use old Falloff ? (bUseOldFallOff) <choices> !FGD 

Deprecated.
Sets old falloff state, disabled or enabled. This feature is disabled in the code, so you can't use old falloff (although it is still used for the flashlight).

• 0: Disabled
• 1: Enabled

Light Color (LightColor) <color255>

The RGB color of the light. Colors must be between 0 and 255.

Light Intensity (Intensity) <float>

Intensity/brightness of the light. It's RGB * intensity.

Note:With 0 it will make the light disabled, including the effects. Doesn't affect shadows.

Range (Range) <float>

Range of the light, or how far the light source can illuminate. Measured in Hammer Units.

Warning:This is one of the parameters that affects performance in the game. Smaller values ​​allow you to process less geometry and save performance.

Important:Range is limited, the limit depends on intensity value. Do not use values ​​bigger than the intensity value allows.

Examples

Range - 50 Range - 1000 Range - 15000

Enabled (Enabled) <choices>

Sets light state on spawn, enabled or disabled.

• 0: Enabled
• 1: Disabled

Appearance (style) <integer choices>

Appearance presets.

Lightstyle presets (epilepsy warning)

Literal Value	Description	Sequence	Preview
0	Normal	m
10	Fluorescent flicker	mmamammmmammamamaaamammma
2	Slow, strong pulse	abcdefghijklmnopqrstuvwxyzyxwvutsrqponmlkjihgfedcba
11	Slow pulse, noblack	abcdefghijklmnopqrrqponmlkjihgfedcba
5	Gentle pulse	jklmnopqrstuvwxyzyxwvutsrqponmlkj
1	Flicker A	mmnmmommommnonmmonqnmmo
6	Flicker B	nmonqnmomnmomomno
3	Candle A	mmmmmaaaaammmmmaaaaaabcdefgabcdefg
7	Candle B	mmmaaaabcdefgmmmmaaaammmaamm
8	Candle C	mmmaaammmaaammmabcdefaaaammmmabcdefmmmaaaa
4	Fast strobe	mamamamamama
9	Slow strobe	aaaaaaaazzzzzzzz
12	Underwater light mutation	mmnnmmnnnmmnn

Tip:Use new lights instead for lights with custom appearance, because static lightmapped lights reduces performance with this feature (especially near displacements).

Note:Custom light styles are not possible.

Light Ambient Color (LightColorAmbient) <color255>

The RGB color of the shadows. Colors must be between 0 and 255.

Examples

0 0 0 0 0 255 255 168 168

SpecularMultiplier (SpecMultiplier) <float>

Specular multiplier. Sets intensity of new specular shader from this light source. It's RGB * Intensity * SpecularMultiplier. 0 means disabled.

Examples

0.5 1 2

falloffConstant (falloffConstant) <integer> !FGD 

Deprecated.
Constant value (can work only if old falloff is enabled).

falloffLinear (falloffLinear) <integer> !FGD 

Deprecated.
Linear value (can work only if old falloff is enabled).

falloffQuadratic (falloffQuadratic) <integer> !FGD 

Deprecated.
Quadratic value (can work only if old falloff is enabled).

OuterAngle (phi) <float>

Outer angle for spot light.

Warning:This affect shadow quality, less is better.

Important:Don't use values 180 and higher, this will make shadows and lighting broken.

InnerAngle (theta) <float>

Inner angle value for spot light.

Warning:Using values higher than in OuterAngle will not make ShadowFOV value higher. This will result in broken shadows.

AngularFallOff (angularFallOff) <float>

Angular falloff value.

Examples

Note:Results depend on values of OuterAngle and InnerAngle. AngularFallOff - 1 (OuterAngle - 60, InnerAngle - 30) AngularFallOff - 30 (OuterAngle - 60, InnerAngle - 30) AngularFallOff - 60 (OuterAngle - 60, InnerAngle - 30)

Light Type (LightType) <choices>

Type of the light. This affects the behavior of the light source with parent, enable/disable dynamic models in shadowmaps, enable/disable static shadowmaps.

• 0: Static - used only static shadowmaps, this means that shadows are cast only by static objects (prop_static, geometry, etc). Cannot move with parent.

Important:Brush entities and bmodels are also included in static shadowmaps and they never update (including func_physbox).

Note:Static shadowmaps will update after save reload (only once).

• 1: Stationary - the same as Static, but with dynamic shadows for dynamic models.
• 2: Dynamic - lighting don't use static shadowmaps at all. It uses dynamic shadows for static objects and dynamic models. This type also can move with parent. This type is expensive, usually used for moving lights, but also can be used if you're getting issues due to static shadowmaps.

Examples

Note:Note that shadow from metal box and grate box are flying on first and second pictures, that's because both was placed in air on map spawn. Doesn't happen on third picture, because the light updated shadow for both. Static Stationary Dynamic

HasShadow (HasShadow) <choices>

Sets shadows state for the light, enabled or disabled. Remember that the default choices is No.

• 0: No
• 1: Yes

Examples

Has Shadow - NO Has Shadow - YES

ShadowMapLOD (ShadowLod) <choices>

Resolution of shadowmap used by this light. This affects the quality of the shadows.

• 0: 256
• 1: 512
• 2: 1024

Examples

256 512 1024

Important:You cannot use any value from here an unlimited number of times. More information below.

ShadowRadius (ShadowRadius) <float>

Radius of shadow edges for soft shadows. If its value is negative, code will auto assign a value depending on ShadowLod. These code based values can be adjusted via convars nr_shadow_rad_High, nr_shadow_rad_Med and nr_shadow_rad_Low.

Examples

ShadowRadius - 0.0001 ShadowRadius - 1 ShadowRadius - 5

Tip:Don't use very low values, because the shadows will look like stairs. Also don't use very high values, because the noise will spoil them a lot, or you'll see only noise.

NearZ (NearZ) <float>

NearZ used by shadowmap camera for this light. This is the distance at which the light source will start cast shadows.

DepthBias (DepthBias) <float>

DepthBias is offset added to depth values in shadowmaps.

Examples

DepthBias - 0.0002 DepthBias - 0.002 DepthBias - 0.0000000002

SlopeDepthBias (SlopeDepthBias) <float>

Slope Depth Bias used for surfaces having aliasing due to steep angles with light.

Examples

SlopeDepthBias - 0.2 SlopeDepthBias - 8 SlopeDepthBias - 20

NormalBias (NormalBias) <float>

While rendering objects into shadowmaps, each vertex will be moved along -ve Normal direction, giving it an appearance of shrinking while rendering to shadowmaps. This property determines the amount of Units to be moved. Helps with shadow aliasing.

Examples

Note:You will not see any changes if your material doesn't not provide bumpmap. NormalBias - 1 NormalBias - 5 NormalBias - 20

Important:Increasing this value will make shadows between different surfaces less accurate, greate example is third picture in examples, there you can see "two" shadows from railing.

Bug:Numbers lower than 0.8 can cause huge graphics issues. Example.

Tip:Increase this value if you are getting aliasing issues like this.

ShadowFOV (ShadowFOV) <float>

Fov used by shadowmap camera for this light. Keep it 0 to use Outer angle as the fov.

Bug:If value lower than OuterAngle value, the lights will have visual issues.

Example

ShadowFOV value is 70 here, but OuterAngle value is 140.

Enable Texture Light (bTexLight) <choices>

Sets lightcookie (texture lights) state, enabled or disabled.

• 0: Disabled
• 1: Enabled

Examples

Disabled Enabled

Warning:This is one of the most expensive features, use wisely.

Texture name for TexLight (texName) <string>

Determines which texture will use the light source. Lightcookies are using .vtf (not .vmt) texture from files (just like env_projectedtexture).

.Enable Prop Only Mode (bNegLight) <choices> 

Deprecated.
Sets prop only mode, which supposed to disable shadows for world geometry. Doesn't work. The same effect can be achieved with shadow pass settings.

• 0: Disabled
• 1: Enabled

TexCookieFramesX (TexCookieFramesX) <integer>

Number of frames in 1 row of atlas.

TexCookieFramesY (TexCookieFramesY) <integer>

Number of frames in 1 column of atlas.

TexCookieFps (TexCookieFps) <float>

The amount of time it takes to move to the next atlas frame.

Tex Cookie Scroll Mode (bTexCookieScrollMode) <choices>

Sets texture scrolling function state, enabled or disabled. ScrollSpeedU and ScrollSpeedV sets scrolling speed and direction.

• 0: Disabled
• 1: Enabled

ScrollSpeedU (fScrollSpeedU) <float>

Scrolling speed along Y axis.

ScrollSpeedV (fScrollSpeedV) <float>

Scrolling speed along X axis.

ShadowPass_Brush (m_bSRO_Brush) <choices>

Do we want to render world geometry in shadow passes for this light ? Doesn't affect bmodels.

• 0: YES
• 1: NO

ShadowPass_StaticProp (m_bSRO_StaticProp) <choices>

Do we want to render prop_static in shadow passes for this light ? This also affect bmodels.

• 0: YES
• 1: NO

ShadowPass_DynProp (m_bSRO_DynProp) <choices>

Do we want to render dynamic models in shadow passes for this light ?

• 0: YES
• 1: NO

ShadowPass_AlphaTest (m_bSRO__Trans) <choices>

Do we want to render models with transparency materials in shadow passes for this light ? Objects with transparency can cast shadows if your model includes a material without transparency.

• 0: YES
• 1: NO

Inputs

SetColorLight <color255RedirectInput/color32>

Change light's color value.

SetIntensityForLight <floatRedirectInput/float>

Change light's intensity value.

TurnOn <void>

Turn the light on.

TurnOff <void>

Turn the light off.

Toggle <void>

Toggle the light's current state.

InputFixRotBugDueToTram <void>

Resets the bounding box size taking into account the current FOV and range values. Can be used to fix the bounding box size after applying new settings for light.

Bugs/Limitations

See /Bugs and limitations

See also

• newLight_Point - point deferred light entity.
• NewLights_Spawner - spawner of deferred point lights.
• env_lensflare - cinematic dynamic lens flare.
• newLight_Dir - directional sun light with godrays only.
• newLights_settings - entity that changes deferred light settings.
• godrays_settings - entity that changes godrays settings.
• env_cascade_light - deferred cascade sun light entity.
• New Lights Editor - in game deferred lights editor.
• Effect flags - effects flags, some of them are dynamic light effects.
• BlackMesa XenEngine: Part 4 – Lighting & Shadows - page from Chetan (lead programmer for Black Mesa) about new lights.
• BlackMesa XenEngine: Part2 – How a Frame is Rendered - page from Chetan (lead programmer for Black Mesa) about how a frame is rendered.
• BlackMesa XenEngine: Part1 – Heavily Modified Source Engine page from Chetan (lead programmer for Black Mesa) about Xengine.