Im really curious where this one is going. Do you mind bringing us step by step of what you are using please?
Like the wave wake- looks exactly as it should be.
Its propably not the best method, but its relatively simple, cheep and non toxic. I use a material called Acryllic Gel Medium which you can buy in any craft or art store - it allso works as glue, but is primely intended to build up mass in acryllicpainting. It comes in different textures, this is the finest without anything added.
First i make the base, in this case its a piece of MDF - medium density fiberboard - its nice and heawy and dont warp with moisture - still its a good thing sealing it. I paint the base, in this case diffent shades of green to simulate the wavepattern I want to achive with the gel - finish with a gloss laquer or future, it helps the gel flow and fill any roughness in the base.
Then i begin building up the water, I have added several layers of Acryllic Gel Medium which has been tinted in variying degress with acryllic paints - different shades of green. - I have added a thicker layer where the waves is supposed to be, but as the Gel is rather fluid, it takes several times to build it up.
Drying time is abuot 1