About this 3D model
I found a nice color 3D scan. This frog sculpture has been scanned with an Artec Eva: https://viewshape.com/shapes/ep7vwvyadhi I added the color model (made solid with MeshMixer) as ColorModel.zip. I edited the file with MeshMixer: added a flat base, oriented it and sculpted some parts. That is the STL file.