In Blender 2.83 in the EEVEE render engine the “Additive” and “Multiply” modes that were present in Blender 2.80 were removed from the possible transparency blending modes.
But if you need to use these transparency blending modes in Blender 2.83, you can get them with nodes.
For both modes in Blender 2.83, in the “Material Properties” panel, set the “Blend Mode” to “Alpha Blend” and add the following nodes to the material node tree:
For Additive mode
For Multiply mode
