Accumulation Motion Blur
This is a visual effect that simulates the characteristic accumulation motion blur effect found in many PlayStation 2 games.
GDScript Only
## Creates a PlayStation 2-like accumulation motion blur effect.
##
## Add to _process(). The frame blending effect is applied to the area
## within the boundaries of the texture_rect node.
## It is recommended to only set the alpha from 0 to less than 1.
func accumulation_motion_blur(texture_rect: TextureRect, alpha: float = 0.5, use_frame_post_draw: bool = true, viewport: Viewport = get_tree().root.get_viewport()) -> void:
alpha = clamp(alpha, 0.0, 1.0) # Alpha values are 0 through 1
var image: Image = Image.new()
var texture: ImageTexture = ImageTexture.new()
image = viewport.get_texture().get_data() # FORMAT_RGBAH
image.flip_y() # Images start out upside-down. This turns it rightside-up.
if use_frame_post_draw:
yield(VisualServer, "frame_post_draw") # Changes when the effect is rendered. Changes the vibe.
texture.create_from_image(image) # Turn Image to ImageTexture
texture_rect.modulate.a = alpha # Changes the opacity of the frame blending
texture_rect.texture = texture # Applies the image of the previous frame to the texture_rect
GDScript + Godot Shader Language
## Godot Accumulation Motion Blur
## By Lamb; MIT license
##
## Use in conjunction with the accumulation_motion_blur shader material.
func accumulation_motion_blur_shader(material: ShaderMaterial, viewport: Viewport = get_tree().root.get_viewport(), post_frame_draw: bool = true) -> void:
var image: Image = Image.new()
var texture: ImageTexture = ImageTexture.new()
image = viewport.get_texture().get_data()
texture.create_from_image(image)
if post_frame_draw:
yield(VisualServer, "frame_post_draw")
material.set_shader_param("framebuffer", texture)
// Godot Accumulation Motion Blur
// Use in conjunction with the accumulation_motion_blur_shader() GDScript method
// to feed this shader the framebuffer texture.
// Apply this shader material to a ColorRect node to affect visuals underneath it.
shader_type canvas_item;
uniform float alpha: hint_range(0.0, 1.0, 0.001) = 0.5;
uniform float blur = 0.0;
uniform sampler2D framebuffer;
void fragment() {
COLOR = texture(framebuffer, SCREEN_UV, blur);
COLOR.a = alpha;
}
Shader code
// Godot Accumulation Motion Blur
// By Lamb; MIT license
//
// Use in conjunction with the accumulation_motion_blur_shader() GDScript method
// to feed this shader the framebuffer texture.
// Apply this shader material to a ColorRect node to affect visuals underneath it.
shader_type canvas_item;
uniform float alpha: hint_range(0.0, 1.0, 0.001) = 0.5;
uniform float blur = 0.0;
uniform sampler2D framebuffer;
void fragment() {
COLOR = texture(framebuffer, SCREEN_UV, blur);
COLOR.a = alpha;
}