I downloaded latest version of 3b1b manim from github. When I render the scenes by default background is gray how to change it to black.
I'm trying run essentially two animations (ref. following code): class RelTrain(Scene): def construct(self): train = Rectangle(height=1, width=4)
I'm trying to use LinearTransformationScene's apply_matrix multiple times: from manim import * class LT(LinearTransformationScene): def __init__(self):