1. Obviously Hook5 - full version
2. Some water ripple normals. You can get them somewhere around here, google them or simply download this pack water_normals.7z
   Put them in your _hook5data folder
3. A flat H5 object such as grass_texture_01.h5m from Siberia object pack. You can get it here water_h5_object.7z
4. Text editor (Notepad will do)
5. Any photo editing software (Photoshop, Paint.net, Gimp etc)

Let's put an water object first. For those who are not familiar with the process, here are the instructions

1. Click 'Create Water' in level pop-up
2. Select flat H5 object as a model file. For instance grass_texture_01.h5m mentioned above
3. Position, rotate & scale a water object to fit your scene
4. Now we need to apply some water ripple normals. Unfortunately we can't do this in H5 interface, we need to use a text editor. Save the level and open _level_definition.txt in text editor. Find the water object we just added and add these 2 lines at the end of its section

   override.0.diffuse.texture = _hook5data\water\water_noise.dds
   override.0.normals.texture = _hook5data\water\water_noise2_4x4.dds

   Experiment with different textures from water folder to match your scene. Reload level after each change in the text editor.

5. Set up other water parameters to your liking. Mine from the screen above are as follows:

   Spoiler

   [water_still]
   enable = true
   type = hook_water
   style = object
   file = _hook5data\water\grass_texture_01.h5m
   position = 0.000000, 0.155000, 0.000000
   rotation = 180.000000, 90.000000, 0.000000
   scale = 10.000000, 0.010000, 10.000000
   shallow_color = 0, 0, 0, 255
   deep_color = 36, 37, 52, 255
   wave1_scale_normal = 1.000000
   wave1_scale_uv = 4.000000, 4.000000
   wave1_speed = 0.000000, 0.000000
   wave2_scale_normal = 2.000000
   wave2_scale_uv = 6.000000, 6.000000
   wave2_speed = 0.000000, 0.000000
   fog_distance = 2.000000
   reflection_amount = 1.000000
   reflection_colorize = 1.000000
   refraction_amount = 1.000000
   glow_intensity = 0.000000
   cull_mode = 1
   parent_name = 
   override.0.diffuse.texture = _hook5data\water\water_noise.dds
   override.0.normals.texture = _hook5data\water\water_noise2_4x4.dds
   

   Note that X rotation is set to 180 & cull_mode set to 1 (reversed normals). I don't know why, but it works better than default 0 & 0. But it may not for you so again, experiment.

   

Now hide the water plane and let's create the mirror object.

1. Click 'Create mirror plane' in level popup
2. Scale position, rotate & scale mirror to fit your scene. Make sure the mirror is just below the water plane. Y value should be 5mm (0.005) less that the water plane's Y.
3. Apply water normal of your choosing to the mirror (normals map file) and set the distortion scale to some low value, 0.005 for instance - or more for more disturbed water.
   My settings are as follows.
   Spoiler

   [water_mirror]
   type = mirror
   enable = false
   position = 0.000000, 0.150000, -1.069999
   rotation = 90.000000, 90.000000, 0.000000
   scale = 4.000000, 4.000000, 1.000000
   own_render = true
   darkness = 0.000000
   diffuse_map =
   normal_map = _hook5data\water\water_noise2_8x8.dds
   distortion_scale = 0.005000
   specular_map =
   script_name =
   parent_name =

   
   You should end up with something like this

Unhide the water plane object and you should have scene like this

Note that the water distorts the mirror even more but the mirror is not transparent and water distortion & depth is missing. The trick is to make the mirror a little bit transparent. To do that we need to create custom specular texture for the mirror.

1. Open photo editing program and make new texture. It doesn't need to be big. 128x128 px will do.
2. Select Red channel. This channel is responsible for mirror transparency. Fill it with about 50% grey.
   Note that this value works for certain camera angles only (around 45 degrees). Real water reflections are more prominent when you look along it (low angle) than if you look down. You should change this according to your scene. If you look at water from above then it should be darker (about 30%). If along the water it should be lighter (about 85-100%). Experiment with the brightness of this channel to fit your scene.
3. Select Green channel. This channel controls mirror fuzziness. The darker it is the blurrier is the reflection. I've set mine to 85% to make nice soft reflection.
4. Select Blue channel. This one controls mirror glow. We don't want any, so fill it with pure black.
5. If you've done it right, you should end with some yellow-green-ish texture. If you're too lazy to follow the tutorial - which I recommend to understand the RGB values - you can download some prepared ones here water_specs.7z
6. Save the texture to _hook5data/water
7. Finally, select the texture for specular map file of the mirror object