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:
Into the Element Tree:
In the Parameters Editor:
Depending on the chosen blending modes, Smode can or cannot use graphics card blending dedicated features to accelerate the blending. With the Normal , Screen , Linear Dodge (Add) , Dissolve and Multiply blending modes, the blending is always accelerated. For Subtract , the blending is accelerated if the compo is opaque.
In all other cases, the blending relies on custom shaders that require an intermediate rendering of the compo, which makes them a bit more costly than accelerated blending modes.
Here is an overview of all different blending modes available in Smode, the scene is composed with a background Image Fileand a green Uniform 2D Layer with two 2D Mask:
Linear Dodge (Add)