Here's what keeps me busy at the moment, a Brown Water Navy PBR(Tamiya 1/35) that'll be in its element, water.
I used 2 cm thick styrofoam as a base, avilable at DIY shops, in which I cut out the Pibber shape, taking care of how I wnt the boat to properly fit (angle in the water)
Afterwards, I shaped the waves using styrofoam and plaster strips
Ten I used plaster mixed with acrylic paint to shape up the basic form of the river
I used relief putty for the wake foam
I have to change the river color, looks too green and light at the moment. I'll depict the water with clear inclusion resin.