Here's another tip for my online weaving students. This one is about shape building.
When attempting to make a smooth decrease, always hinge on a warp whose last sequence went under that warp. You can only achieve this repeatedly if you're decreasing by multiples of two warps each sequence (ie. abandoning 2, 4 or 6 warps etc).
The arrow in the image above points to the area showing how the last sequence went under a warp. So, that is the warp I will hinge on next.
The weaving below used this technique to create the blue hill on the bottom part of the design.
*Note that this technique is specific to weaving with your design's front facing you while you weave. If you are weaving with your design's back facing your while you weave you will want to hinge on the other warp (ie the warp whose last sequence went over it)
Find video instructions on this technique in my online Weave a Sunset workshop in the Weaving a Smooth Diagonal section.