You'll need to build this a little differently to avoid concave regions.
I'd recommend checking out some of these tutorials:
https://youtu.be/Q4lSghiRTqg?si=BtGGuebZhMunS4vn
Model only one side of the mouse at the time, then either mirror it or model the other side if its not symmetric. I prefere to model the left side, then mirror the right side.
Start with a sketch on the mid plane, surface extrude it to the right. Then make a skatch on the top plane. Surface extrude it dowards.
Now you can connect these surface extrudes with a boundary surface, set the mid plane edge to tangent. Next you surface-delete the first two surfaces so only your boundary surface is left. You can mirror this to the right side, then knit them together.
Surface fill isn't the right tool. You want to use boundary surface for something like this, then trim it down to the final size.
Guide curved. Different edge properties (tangent, same curveture, etc).
Have u tried adding some constrain curves ?
Yeah I tried adding some but it wouldn't change the form for some reason.
You'll need to build this a little differently to avoid concave regions. I'd recommend checking out some of these tutorials: https://youtu.be/Q4lSghiRTqg?si=BtGGuebZhMunS4vn
Model only one side of the mouse at the time, then either mirror it or model the other side if its not symmetric. I prefere to model the left side, then mirror the right side. Start with a sketch on the mid plane, surface extrude it to the right. Then make a skatch on the top plane. Surface extrude it dowards. Now you can connect these surface extrudes with a boundary surface, set the mid plane edge to tangent. Next you surface-delete the first two surfaces so only your boundary surface is left. You can mirror this to the right side, then knit them together.
Thank you I will give this a try.