1. A graphics unit, comprising: circuitry configured to map a texture to a screen space such that a set of multiple pixels in the screen space falls between first and second adjacent texels of the texture in a first dimension; and texture processing circuitry configured to perform different types of interpolation for pixels in the set of pixels, including: using a nearest-neighbor interpolation technique and attributes of the first and second texels respectively to determine pixel attributes for first and second end groups of pixels in the set of pixels; and using a second, different interpolation technique and attributes of both the first and second texels to determine pixel attributes for an intermediate group of pixels in the set of pixels; wherein the texture processing circuitry is configured to perform the different types of interpolation based on a parameter that specifies a size for the intermediate group of pixels.