is there a way to switch between different blend modes in blend(ex9.renderstate advanced) module, so they change each other smoothly, not in a instant matter.
i mean smooth changes of color, from one blend mode to another
no. the blend node just switches between DirectX-predefined formulas. there are no additional tweak parameters exposed from the graphic card.
you could try spreading the blend mode pin (use the inspector) to draw every object twice and then tweak the brightness or transparency of your objects to make crossfades between your objects.
(if you do so, you might at one point in the future like to read about z-fighting)
or use a shader.