Back in about Jan07 there was some stuff/tutes, about using TerrainTools to  create a "surf" on an "invisible" triangular object to resemble bow wave effects on a boat.

Appreciate any help in locating that forum thread.---wherever it was?

Brian

 I think that this is probably it...

http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3105298&ebot_calc_page#message_3105298

Thanks Mark.

Brian

Mark
Like Evinrude in that thread, I just can not seem to get it to work--though I feel sure I have in the past!

Did you, or anyone, get it to work?--have a shader setup to help me?

Having a thick day--again!

Brian

It's a little counter-intuitive. Here's a sample that I slapped together. Click the image for a larger view.

What you can't see in the screen capture is the vertex object that is actually in the shape of the wake. This has it's visibility turned off. 

The shader for the wake is a multichannel mixer that combines two water shaders using the Terrain>intersect function. You can see the object "wake", which is the vertex object, as the shape that the Terrain Tools function is tracking to blend the two shaders together. 

Then I just added some noise to the blend function and additionally created an irregular fall-off in the plug-ins dialog box. (you just have to click on the button for custom falloff)

Just post back with any questions.

Mark,
What a great quick response.

I printed out that  screen grab image to study---I think I am even more(very thickly) confused!

Stuff shown that is different /contrary to earlier "explanations"?

Do you have the time, using simple models would be enough, to provide a full .car file that one could study?

Could it be an addition to the brilliant "Dark Arts"?

Brian

ps  My question derived from trying to help a thread at the DAZ forum--you have no idea at how frustrated I am at the moment because I am positive I "solved" this once before!

For the life of me I can not fathom why the wake won't effect on the bow wave "shape"

Brian

 I can't read the type in the screen capture but make sure that you spell/use the vertex object name EXACTLY including capitalization. From what I can tell, it looks like everything is set up right so it's some other little goofy issue - like spelling.

The problem was not naming but that my "shape" form was an 3DM file.

As a .obj file--NO PROBLEM!

Thanks Mark!
Mumble/grumble/moan/groan

Brian

However, in the process I have lost the particular shoreline effect I had----see previous post image.

Is there a way that I can get different , individual,effects to the Terrain and the BowWave items.?

Brian

Well yes, there is. Create two shaders that use the terrain tools blender: one for island and one for the boat. ;-)  

If you're using reference shaders instead of actually using a multichannel mixer, it won't be a problem - it's just an issue of range of effect.

Thanks for the prompt reply Mark.
I have/had saved the two shaders involved into my Shader browser----and that idea was what I have been trying. (Obviously they both saved  with multi-channel)

However, I gather a "Reference Shader" is not the same as those?

(Sorry if I seem as thick as usual!)

Brian

 Reference Shaders are an option under the Complex Shader in the Shader tree (only available when selecting from the top level of a shader) This allows you to create a shader tree that "subscribes" to existing shaders. 

This provides for consistency across multiple implementations of, in this case, a water and a foam shader. Each one uses the same reference for water and foam but you can change the scale and objects that the master shader (the multichannel  mixer) interacts with.

Thanks Mark.
After all these years,both C4 and C5 printed manuals as well, this one never registered before.
Will learning of Carrara ever finish?

Hopefully I will get on top of this today--it's 7.30am and I had to check for your response before I got dressed!

Great help mate.

Brian

Mark
I am so frustrated at my "thickness" but I have difficulties still.

I have Two individual Water shaders for applying to the Infinite Plain.

One has a Terrain tools Surf effect assigned by the Intersect to the Wake shape object.

The second shader, with a differently constructed Surf effect, is assigned to the Terrain via the Intersect.

To get the end result needed it would seem that both shaders need to be applied to the Infinite Plain at the same time?

I have been attempting to find a solution via the Reference Shader principle but I am stumped.

Brian

 Ha, you are so right. I totally spaced that. More coffee please. 

To remedy this, you can do the same trick but instead, make a plane (vertex or primitive) and make it a child of the boat. Then move this to be something like .01 above the infinite water plane. Just like before, you'll have two reference shaders. However, one of them should have an alpha value of zero to make it invisible so that the only thing showing is the foam.

This is a similar trick to what was done on the CG boats here to create the boat wakes: http://carrara3d.com/3d_gallery_icebr.html 

Look at the videos and  stills. 

Obviously, I am now as good as all that carrara3D stuff I have drooled over for years now!(HA<HA)

Hope you can put this all together for a Dark Arts so all can share Mark.
Very apprecitive.

Brian

Hi BWTR,

Can you post the .CAR file for your last post ?

jcampos
The .car file is above 5.5MB.
PM me with your e=mail address and happy to post.

Brian

Well--just a first quick try!

Brian

looking good - can you add this over an ocean primitive?

Ha Ha--

It's on my list BUT, why not SHOW ME!

Brian

I don't even know how you did the first foam-wake ; )
I'm so behind the curve now...

And, to show the potentials of the "Ocean" and "Primivol"!--Brian has great fun!

Brian

The latter shows up a bit at the top edge of the Ocean Primitive.

Whew!
Still lots to learn.

Brian

Looks good - maybe the unlucky chap fell overboard.  Happens here in Alaska all the time on the fishing boats, and IF they're found later, many have their zipper down.  You don't hear that on the Deadliest Catch. 

Do you REALLY! want me to add Viccy!!!!!!!-----or James?

Aaaaakkkoooooplut  he says!

Brian

ps The zipper is all part of the beginning and end of life as we know it?

Like that image mate.

WHICH New mouse?----asks Arthur!

Brian

I was referring to the new computer post and the problem I am having with my trackball mouse.  I changed to the Logitech TrackMan Wheel - thumbcontrol - and so far the tight pain between my spine and shoulder blade has eased up with I mouse around.
Thanks for the tip.

Here are some Bow/Stern wave .ob files that maybe be helpfull to use?
Just an idea, not properly tested.

Brian

Brian
pm me for the .obj file if of interest