Types/BlendMode
A Types/string that determines how sprites/animations should blend with the background. The possible values are listed below.
Note: In most of Factorio it is assumed colors are in alpha premultiplied format: FFF #172 - Blending and Rendering. Sprites get premultiplied when loaded, unless premul_alpha
is set to false on the sprite/animation itself. But generating mipmaps doesn't respect premul_alpha
, so lowel mipmap levels will be in premultiplied format regardless.
Possible values
normal
The result color is determined with the following formula:
Result = Active_RGB + Background_RGB * ( 1 - Active_Alpha )
Note: This is alpha blending with an assumption that Active_RGB is already premultiplied with Active_Alpha.
additive
The result color is determined with the following formula:
Result = Active_RGB + Background_RGB
additive-soft
The result color is determined with the following formula:
Result = Active_RGB * ( 1 - Background_RGB ) + Background_RGB
multiplicative
The result color is determined with the following formula:
Result = Active_RGB * Background_RGB
overwrite
The result color is determined with the following formula:
Result = Active_RGBA or Background_RGBA