Ren'Py [SOLVED]Show image() "with dissolve" syntax

[GoldenD]

Hi guys,

probably easy for you but i don't find samples or explanations with this syntax. This works perfectly, but how can i use effects with this :

label caption:
.../...
    show image("{}".format( picScene )):
        align(0.5,0.02)         # i can use attributs without problem
                                # but i just can't find dissolve syntax
.../...