This dialog gives access to parameters which effect the visual appearance of objects drawn by FSImp. It contains the folllowing tabs:

Light

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Paras

Name	Description	Min	Max	Default
Show missing	Shows grey polygons when a bitmap cannot be found			no
Smoothen big	The edges of polygons can look jagged when displayed. This parameter performs antialiased smoothing on big flat areas. Antialiasing results depend on openGL settings and can result in hair thin outlines. No - never smoothen Yes - always smootehen High - smoothen when the viewer is more than 300ft above ground level			High
Smoothen small	Antialiased smoothing on small flat areas. No - never smoothen Yes - always smootehen High - smoothen when the viewer is more than 300ft above ground level			High
Smoothen taxilin	Antialiased smoothing on yellow taxiway lines.			yes
Smoothen lines	Antialiased smoothing on other lines.			yes
Smoothen 3D	Antialiased smoothing on all 3D objects.			no
Smooth deg	Flat polgons in the distance tend to give disturbing interference patters. When smooth mode is Auto, FSImp smooths these polygons when the angle between the viewer and a model is less than this parameter in degrees.			10
AGL smooth hi ft	Above this height above ground level, in feet, antialiasing is applied. The antialiasing algorithm causes outlines on triangles. This is disturbing when near the ground.	0		200
AGL max ft	Tiles are loaded as long as the eye is below this level (feet). This prevents tiles being unnecessarily loaded when flying high over areas.	0		10000
Depth test flat	Enables depth testing for flat objects.			yes
Depth write tpnt	Enables depth writing for transparent polygons.			yes
Poly Ofst factor	Ensures that objects nearer the viewer hide objects that are farther away. For some objects, especially flat ones that are close to each, the hardware has difficulty to determine which is nearer. The result is that such objects flicker. Runways and ground terrain are such an example. These parameters offset the polygons slightly to reduce flicker			-5
Poly Ofst units				0
Exclude bitmaps	Parts of models that use bitmaps defined by this parameter can be filtered out. You can enter a list of substrings separated by commas: landarr,_oil,_rw0,piano,runwayid
Exclude catgries	All models that are defined in a range of FS BGL categories can be filtered out and not displayed. Each model may have a category. Type in a list of categories, and ranges, separated by commas. A designer can choose one of the following categroies or a category in between 4 MESH 7 SURFACE 8 POLY 12 RIVER 16 ROAD 20 LINE 24 RUNWAY
Raise m	All models can be raised up by this amount, in meters. This can reduce polygons fighting with the X-Plane terrain.			0
Raise factor	The elevation of all models can be stretched by this factor. This can reduce polygons fighting with the X-Plane terrain.	0.5	1.5	1.0
Flat deg	Flat polgons in the distance tend to give disturbing interference patters. FSImp stops drawing these polygons when the angle between the viewer and a model is less than this parameter in degrees.			8
View width pix	The current screen width resolution in pixels.			1024
View diagonal in	The diagonal size of the screen in inches. It is used to calculate the size of a pixel.			17
Replace objects	Disables X-Plane objects (buildings, smokestacks, etc). These may sometimes interfere with objects drawn by FSImp. This may not work in all X-Plane versions and areas.			no
Poly length m	X-Plane models a spherical earth. Very large objects must be cut up into smaller pieces of this length before being wrapped onto this sphere.			500
Dist show all m	When models are within this distance, in meters, of the viewer then it is not simplified. The bitmap algorithm monitors bitmaps for these models more often.			150

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Bitmaps

Controls the size, speed and quality of bitmap images that are loaded and displayed.

Name	Description	Min	Max	Default
SRAM max Mb	Bitmaps are loaded into SYSTEM RAM and are cached there. This is the size of the cache in Megabyte.			64
Load mipmap	When a bitmap is loaded from a file into SRAM, it can be squeezed to save SRAM. 0 means no squeezing, 1 squeezes by 4, 2 squeezes by 16, 3 squeezes by 64 etc. This can be used on systems with little SRAM.	0		0
Dist unload nm	A bitmap which is in SRAM is unloaded when it is no longer needed. This occurs when the eye is farther than this parameter in nautical miles or the bitmap has not been displayed for an amount of time.	0		12.5
LoadHold min sec	After a bitmap is loaded into SRAM it holds its size for this minimum time. This prevents a bitmap from continually changing its size and thus wasting CPU time. If this parameter is set to 0 then a simplified algorithm is implemented which reduces the number of times that bitmaps are loaded from file.			30
LoadHold max sec	When a bitmap is in SRAM but is no longer being used then it is held for this time before being removed. If you change your viewing direction then bitmaps may still be present and do not need to be reloaded into SRAM.			60
VRAM max Mb	Bitmaps are selected into VIDEO RAM only when needed. This is the amount of VRAM, in Megabytes, that FSImp is allowed to use.			32
Select mipmap	FSImp automatically calculates which size bitmap is needed in VRAM. When a bitmap is selected from SRAM into VRAM, the decision can be changed: -2 means 16 times bigger, -1 means 4 times bigger, 0 means the calculated size, 1 squeezes by 4, 2 squeezes by 16 etc.	0		0
Dist select nm	Bitmaps are copied into VRAM at within this distance. Outside this distance an average colour is used.	0		7.5
Select rate Kb	When a bitmap is selected from SRAM into VRAM during flight, it may need to be squeezed to prevent the simulator stuttering. The size of the maximum transfer is given in Kilobytes per bitmap.	0		256
Hold min sec	After a bitmap is selected into VRAM it holds its size for this minimum time. This prevents a bitmap from continually changing its size and thus wasting CPU time.			15
Hold max sec	When a bitmap is in VRAM but is no longer being used then it is held for this time before being removed. If you change your viewing direction then bitmaps may still be present and do not need to be reselected into VRAM.			60
Repeat m	Some bitmaps repeat themselves over a large area. Each object has its own repeat factor which is then multiplied by this size, in meters.			100
Load pause sec	After loading a bitmap, FSImp stops monitoring bitmaps for this time in seconds. If too large then it takes long until all bitmaps are ready.	0		0.2
Load fast sec	After teleporting FSImp loads near bitmaps as fast as possible. This sets a maximum time limit, in seconds, for this phase.	0		30
Size max pix	When a large bitmap is loaded from a file into SRAM, it can be squeezed to save SRAM.	16	2048	1024
Mipmap max pix	FSImp can load a bitmap and squeezed versions (mipmaps) of it into VRAM at the same time. The video card can then decide which versions of the bitmap to apply to each polygon to prevent shimmering. If a bitmap image is large then it plus its mipmaps consume too much VRAM. This parameter is the size limit for bitmaps that can be mipmapped. To disable mipmapping set to 0.	0		512
Average pixels	When making squeezed versions of bitmaps, neighbouring pixels can be averaged to generate each pixel. This process may cost time (FPS). None - no averaging Little - a few neighbours are averaged Normal - more neighbours are averaged Full - all neighbours are averaged			Normal
Transparent fix	Adds colour to certain transparent pixels. This process may cost time (FPS)			no
Season	Auto selects the season based on the X-Plane date in the northern hemisphere. You can set the season manually if you want. Seasonal specific bitmaps are loaded depending on the season.			Auto
Reload bitmaps	All bitmaps are discarded and then bitmaps are loaded and selected as needed			no

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Terrain

Name	Description	Min	Max	Default
Show sea	Show sea models if detected. Only flat models with bitmaps containing "SEA." are assumed to be sea.			No
Show 3D terrain	Show 3D terrain if available. At present only rare TexRelief commands are interpreted.			yes
Show flat terrn	Show flat terrain if available. Disabling this can sometimes remove sea terrain.			yes
Show photo terrn	Show photo terrain if available. Ignore means that FSImp does not even look for these, thus saving time and memory.			yes
Show vector terr	Show Vector Terrain Polygon (VTP) models. These are usually generic terrain textures but can also be photo terrain. Ignore means that FSImp does not even look for these, thus saving time and memory.			yes
Show vector line	Show Vector Terrain Polygon (VTP) line models. These are usually rivers, railways and roads. Ignore means that FSImp does not even look for these, thus saving time and memory.			yes
Show underlay	Many sceneries have a carpet under 3D objects. This usually consists of grass or a photo image. If you have photographic or satellite images you may want to disable this parameter.			yes
Show 3D models	Buildings, signs, jetways etc			yes
Show trees	Trees, bushes etc			yes
Show lines	Radar and light supprts etc			yes
Replace terrain	When the eye is close to the ground (<10m) the X-Plane terrain can be disabled. No - never replace X-Plane terrain Yes - always replace X-Plane terrain Low - replace X-Plane terrain when low and underlay shown Low+FPS - replace as Low but include FPS monitoring Photo - when covered by photo terrain			Low+FPS

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Airport

Name	Description	Min	Max	Default
Flatten airpts m	The terrain for this distance around airports, in meters, is flattened. Within this distance, the X-Plane airport elevation is used when positioning objects. Beyond this distance the X-Plane mesh terrain is used. If set to 0 then the airport elevation is no longer used and models (including runways) are wrapped onto the terrain. This produces wierd effects in versions before XP8.00 as X-Plane automatically flattened airports.	0		500
Show AFCAD	Some sceneries use AFCAD files to define the taxiways, aprons and lighting. This can sometimes lead to taxi lines and lights can being show twice. I do not have an automatic solution but you can enable/disable this manually.			yes
Show ramp	Large areas of asphalt tarmac or concrete No - never show Yes - always show Auto - show only when the X-Plane airport network is replaced			Auto
Show taxi+runway	Smaller areas of asphalt tarmac or concrete and dedicated taxiway commands. No - default X-Plane airport network is always used Yes - default X-Plane airport network is replaced when synchronised Auto - default X-Plane airport network is replaced when synchronised and X-Plane version allows ground surface detection (from 7.40)			Auto
Rwy display	Selects how FSImp display runways that it draws. You can change this setting if the ADD-ONs for an airport use models with dedicated bitmaps for runways.			no
Runway edge line	White runway edge centre lines can look jagged when displayed No - never remove edge lines Yes - always remove edge lines Auto - remove edge lines depending on distance and relative angle			Auto
Show skidmarks	Draw rubber skidmarks on runways.			yes
Show t+r lights	Runway and approach lights. No - no lights Yes - lights all the time Auto - lights at night and when the weather visibility is less than 4nm			Auto
Lights factor	The width of high visibility lights (runway/GLS) can be tweeked.	0.1	10.0	1.0
Show strobes	Some approach and runway end lighting systems have fast flashing lights. These may be disturbing to some users and may trigger epileptic reactions.			no
Show VASI	The visual approach slope indicators are found near the touchdown point of many runways. When FSImp replaces the X-Plane taxi-and-runway network at an airport X-Plane may or may not still show the VASI system.			yes
Runway sync mode	FS and X-Plane runway descriptions often have differences. FSImp tries to reduce these differences. It does this by stretching objects or parts of objects that are near runways. This helps to align runway signs and taxiways near runways. It offers several modes: None - no synchronisation of objects, no replacement of runways Near 1 - move objects based on the nearest runway Near N - move objects based on the nearest runways FS - leave all objects but move the X-Plane runways - ILS/GS/LOC do NOT move End - move objects based on the nearest runway end Airport - move objects based on the nearest airport End+Apt - move objects based on the nearest runway end or airport If you change this mode and apply then all tiles are reloaded			Near 1
Runway move m	Objects within this distance of FS runways are stretched towards XP runways			150
Show static acft	Static aircraft are often complex. This can be used to help frame rate or free up airports for artificially intelligent (AI) aircraft. Aircraft are not always recognised by FSImp as they "look" like any other object especially when service vehicles or cones are near. No - never show static aircraft Yes - always show static aircraft Slow - show static aircraft as long as the user aircraft is slow (on the ground)			yes
Replace concrete	Concrete-like bitmaps are replaced with FSImp\TEXTURE\PMCONCRT.BMP			no
Replace asphalt	Asphalt-like bitmaps are replaced with FSImp\TEXTURE\PMASPHLT.BMP			yes
Replace concrete	Grass-like bitmaps are replaced with FSImp\TEXTURE\PMGRASS.BMP			yes
AGL lines ft	Taxiway lines and (green) lights are displayed as long as the eye is below this level (feet). Set to 0 to disable taxiway lines.	0		500
AGL edge ft	Taxiway (blue) edge lights are displayed as long as the eye is below this level (feet). Set to 0 to disable taxiway edge lights.	0		500

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Light

Name	Description	Min	Max	Default
Material ambient	Reaction of indirect light on all objects.	0	1.0	0.8
Material diffuse	Reaction of direct light on all objects.	0	1.0	0.8
Material speculr	Reaction of reflected light on all 3D objects.	0	1.0	0.8
Shiny metal %	The shininess applied to metal objects. It affects the amount of sunlight reflected.	0	100	100
Shiny others %	The shininess applied to other objects.	0	100	50
Night changes	Night-time bitmaps (lightmaps name_LM.BMP) are loaded at at night. The border between day and night is based on an X-Plane parameter which tells what proportion of lights are on. The larger the value, the later night-time bitmaps are loaded.	0	1.0	0.25
Night scale %	When dedicated nighttime bitmaps are not found, the daytime ones are loaded and darkened to this percentage.			10
Day scale Red %	The red component of daytime bitmaps is lightened/darkened TO this percentage.	0	200	100
Day scale Green%	The green component of daytime bitmaps is lightened/darkened TO this percentage.	0	200	100
Day scale Blue %	The blue component of daytime bitmaps is lightened/darkened TO this percentage.	0	200	100