To clarify the content on this slide - does trilinear filtering sample from different mip-map levels (here, levels d and d+1) to perform eight texel reads (i.e. twice bilinear filtering)? Does this necessarily yield more realistic images?
dawwctor
How exactly would you lerp in between the mip-map texel levels? Do we just average them by considering the actual point perfectly in-between the 2 levels?
seanxu
I think lerping between the 2 mip-map levels is based on the distance L calculated from slide 76
coco
To answer the first question - trilinear filtering does take into account two different mipmap levels (d and d+1). To calculate it, do we just do bilinear interpolation in level d and in level d+1, then interpolate those two values?
To clarify the content on this slide - does trilinear filtering sample from different mip-map levels (here, levels d and d+1) to perform eight texel reads (i.e. twice bilinear filtering)? Does this necessarily yield more realistic images?
How exactly would you lerp in between the mip-map texel levels? Do we just average them by considering the actual point perfectly in-between the 2 levels?
I think lerping between the 2 mip-map levels is based on the distance L calculated from slide 76
To answer the first question - trilinear filtering does take into account two different mipmap levels (d and d+1). To calculate it, do we just do bilinear interpolation in level d and in level d+1, then interpolate those two values?