Remap an Image Using UV Coords

This simple tutorial shows how to remap an image using the uv_coords attribute of the image shader to produce an abstract patterned distortion effect. Further examples can be found here.

 

• Start by assigning a standard_surface shader to a poly plane.
• Increase the emission of the standard_surface to 1. Decrease the base_weight and specular_weight to 0.
• Connect an image shader to the emission_color and add a file texture to the image_name. In this case, we have used the beautiful Mona Lisa.

• Create a ramp (RGB) texture and connect it to the UV Coords of the Image shader. Connect the U Coord of the ramp to the uvcoordsY of the Image shader. Connect the V Coord of the ramp to the uvcoordsX of the Image shader.
• Change the ramp type to Four Corner Ramp.
• Create four different colors for the ramp: red, yellow, green and blue.

• Connect a file or Noise texture to the Color Offset of the Ramp. This will drive the distortion effect.

Image: UV Coordinates

In the UV_coordinates of the image shader, there are controls for further changing the position of the texture map. When animated, this can produce some interesting results:

_{^{Offset U (left). Offset V (right).}}

• Animating the exposure (using a color_correct) connected to the texture used to distort the image shader will produce the final result.

^{_{Exposure (-10 to 0)}}