Shaders are on the feature list definitely.
We currently support tint/brightness on Sprites. Here are all the options
args.outputs.sprites << {
x: 100, y: 100,
w: 100, h: 100,
path: "sprites/player.png",
angle: 0,
a, 255
r: 255, # red saturation
g: 255, # geen saturation
b: 255, # blue saturation
tile_x: 0,
tile_y: 0,
tile_w: -1,
tile_h: -1,
flip_vertically: false,
flip_horizontally: false,
angle_anchor_x: 0.5,
angle_anchor_y: 1.0
}