DB/DecalProperties

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AreaTriggers have two textures imposed upon one another. The relationship between the top and bottom texture can be treated like a donut, where the top is the interior, and the bottom is the donut itself.

See the screenshots below for how some of the attributes behave when changed.

Structure (8.3.5)

Column	Field	Type	Notes
1	ID	Integer	Linked by AreaTrigger decalPropertiesId
2	FileDataID	iRefID
3	TopTextureBlendSetID	iRefID
4	BotTextureBlendSetID	iRefID
5	modX	Float
6	InnerRadius	Float	Inverse of how harshly BotTextureBlendSetID intrudes upon the TopTextureBlendSetID. At 0, there is a sharp cutoff.
7	OuterRadius	Float	Inverse of how harshly TopTextureBlendSetID applies on top of BotTextureBlendSetID. This controls the overall size of the areatrigger texture.
8	Rim	Float	Controls the size of the areatrigger texture by ensuring that the donut outer radius does not change.
9	Gain	Float	Controls how harshly the TopTextureBlendSetID spreads onto the normal textures around it. At 0 there is a sharp cutoff.
10	Flags	Bitmask	Behaviour properties of the decal. Flags 4 makes the texture colour change depending on camera angle - looking down on it is darker than from ground level. Flags 8 makes the bottom texture disappear.
11	Scale	Float
12	FadeIn	Float	Self explanatory. 0 for instant.
13	FadeOut	Float	Self explanatory. 0 for instant.
14	Priority	Int
15	BlendMode	Int	Controls how TopTextureBlendSet applies onto terrain. Type 0 is overwrite but with blending, Type 1 only works without BottomTextureBlendSet and Type 2 is overwrite without blending.
16	GameFlags	Int
17	CasterDecalProperties	Int
18	ArbitraryBoxHeight	Float