Argument Description shader The index of the shader to use.
With this function you can set the drawing target to the given shader and all further drawing will be done using that. You can end shader use with function shader_reset.NOTE: You can only call a shader in the Draw Event of an instance.IMPORTANT! This function is not available with the Trial Licence of the product.
The above code will set a shader top be used for drawing, then draw the current sprite used for the instance using it.