Define how overlapping pixels are blended togetherSmode blending mode are rather standard and correspond to those that can be found in other computer graphics softwares.
Blending modes can be changed either directly from the Element Tree or inside the Parameters Editor and then quickly changed with the up and down arrow keys:
In the Element Tree:
In the Parameters Editor:
With Normal , Screen , Linear Dodge (Add) , Dissolve and Multiply , the blending is accelerated. All other blending modes rely on custom shaders that require an intermediate rendering of the compo, making them a bit more costly.
Here is an overview of all different blending modes available in Smode, with a compo made of a background Image File and a green Uniform 2D Layer with two 2D Mask:
Linear Dodge (Add)