8:34 PM, Thursday February 25th 2021
So I looked through your revisions, and they definitely helped me better understand what you were asking. I made notes directly on your work.
So to answer your question, it comes down to the core principles of how we approach construction as a whole. Instead of trying to "solve" many problems all at once, focus on one at a time. Every additional mass we add represents a single form, so isolate the specific element you're trying to capture, and then focus on establishing how your additional mass "grips" the existing structure. For this, we employ my explanation of thinking about where to place outward curves vs. inward curves, placing complexity along the silhouette to respond to contact made with other structures.
While your tiger drawing is the only one where you're really employing this somewhat correctly on the torso, you're not quite emphasizing that use of inward/outward curves correctly just yet. You're definitely not far off overall, but I think this tendency to try and make bigger, "enveloping" forms or simply trying to do too much with a single form is distracting you from using the techniques I demonstrated previously. You can see how the additional masses are built up one at a time in this rat demo.
Also, here are some additional notes on thinking about how to use the additional masses.
Edit: One thing I forgot to mention is that right now in your rhino and tiger, you're showing areas that you're working more from memory than from direct observation. This is something we can easily slip up on, especially as we try to focus on figuring out the relationships between our forms as we construct. Remember the importance of observing your reference almost constantly, only looking away to capture a specific form in your construction, then looking back to refresh your memory once again.
Next Steps:
Please try doing the 3 additional animal constructions again.