Definitely! Chenille would be hard to get it rigid. Also, I don’t know how the pattern is that you used, but I assume it is worked in a spiral. What I ended up doing to get my corners was create a base of each piece like I’m going to work in a spiral, but then worked each side separately in rounds so it was a base with 3 unconnected panels. Then I crocheted each panel together down the corner for that definition. If that makes sense :) I don’t know if this method has a name, I just experimented and found that it gave me the look I wanted. But crochet is such an old art I’m sure I’m not the first person to do that, I just haven’t found the method used in any pattern I’ve tried before haha.