Ok I was trying to make this thing ; I set up the sea portion to 4 m x 4 m , created a camera and put on top of it but id doesn't grab the square of the repetition , plus the animation messes the borders of the sea surface square .... how I am supposed to do to capture precisely the sides in order to get tileable frames?
Set the camera to Orthographic mode. This removes perspective distortion. Set the render size to 128x128 (or whatever size you want the tile to be). Turn on the Safe Frame preview in the viewport. This shows you the render border. Adjust the camera FOV and position. This is the most difficult part... you need to find where…