Actually, I've figured out that I can just lay them on top of each other and change the opacity of the one on top. This might not work as well in a situation with different patterns though, but it seems to work for what I need at the moment. Thanks.

Hi folks, my dilemma is that I'd like to interpolate the colors between the two blocks shown below (I've rasterized them here, but I have them in SVG as well). The problem is that in Inkscape the "interpolate style" option in the Interpolate effect only seems to interpolate solid fill colo...