Types/BlendMode

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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 lower 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