Help With Underwater Environmets DVD(Missing Section in Lecture 2)

[andy gee]

Hi 2 all

I have just managed to create the rays of light for my underwater scene, using a ray marching method, and I have to say it works better than the spot light mapped method, also it works with mental ray !!

. Create a sphere assign a lambert or blinn to it, scale it to fit your scene.

. Assign a Parti_Volume shader to the blinn/lambert sg1 volume section.

. Create a spot light, and assign that to the light link of the volume shader

. Add a light physical node to the custom light shader of the spot light

. Now if you do a test render, you should have a nice volumetric effect from the spot light.

. Now create a plane, and add a water caustics image sequence into the TRANSPARENCY.

. make sure that alpha is luminance is on and place it inside the volume sphere.
below the Now physical spot light.

when you render the light will pass through the caustic pattern giving you a nicer set of rays.

Just to note that in the volume shader you have to set the mode to 1 and play with the height otherwise you will get this.

Any Problems drop me a line.


Cheers

Andy Gee

Andy Gee

[fatalerror]

anyone using mai exposure simple node? to help out the HDRI lighting?
if so hows it working out for u?

[obocop]

Originally Posted by andy gee

Hey obocop



In regards to your render layers.

What I have done is for each layer if I have elements in the layer which I want the particles ie bubbles to interact with I applied them to the layer then simply added a matt black texture to them in that layer that way you get the interaction and then because its black, your compositer will read it as being cut out still leaving your other stuff in tact.

Andy Gee

Hey Andy, sorry for the late reply...i've been so busy lately...
I added the default black Surface Shader from the Maya nodes in the Hypershader to the anchor, leaving the sand particles as is and rendered it out as a .tga. I brought it into after effects and shake to see if I could get the anchor matte to dissappear. I didn't have much luck, as the alpha channel still showed the anchor as white. In both softwares I used a Channel Reorder to try and put the alpha into one of the colours, say Red for eg. which works to get rid of the black matte anchor shape YAY, but it also takes away the red from the image. Have I missed something?

P.s. your rays look much better than mine...I might have to try your technique.
cheers

[andy gee]

Hi all

Has anybody managed to produce a fog pass render layer ?

It is talked about briefly at the end of the underwater dvd but it doesn't go in to how to setup the fog for compositin.

If anybody has created a fog pass and has composited it,please drop me a line.

any help at all would be great

thanks

Andy Gee

[bennimartin]

Hey andy,
is it possible for you to email me the link to the missing file please ? I have no idea how to do it! I thought when the scene ended in part 2 it was abrupt and i had no idea where the spot light fog lights came from in the start of scene 3!

I attempted the method you described but as far as i can tell it doesn't appear to work.


Cheers benny

bennimartin02 @ gmail

[andy gee]

Hey Benny

Sorry to here that my method doesn't work for you. The lecture on the light beams is a very big file, so I will have to send it to you via www.yousendit.com
because it is about 70 mb size.

send me your e mail address and I will send you the file.

Andy Gee

[bennimartin]

Hey andy thanks for the file!

Somewhere along the line my light that has the caustic map attached to it doesn't show. If i delete the maya ocean it shows but when i create it again it somehow dissapears?!

Any ideas ?

Regards,
Benny

[andy gee]

sorry i dont like spam

[ajvelez]

Originally Posted by andy gee

Hey Benny

Sorry to here that my method doesn't work for you. The lecture on the light beams is a very big file, so I will have to send it to you via www.yousendit.com
because it is about 70 mb size.

send me your e mail address and I will send you the file.

Andy Gee

Hi, I have the Rendering 4 DVD which shows how to make a grid of lights and then map the caustic sequence as a texture projection to each of the lights. This enables the camera to fly through it.

I also was confused when the Underwater DVD didn't explain how to make the light beams. If possible, could you also send me the light beam lecture so I can compare the two methods, thanks!

[jonhk]

Hi folks

I'm new to maya and had bought the DVD - download version. And it seems that quite a number of steps had been skipped, e.g in chapter 2, there was the terrain profile done but no explanation on how to get the sand colour texture done. Any help is greatly appreciated, thanks.

Also, I was wondering if you folks know of any maya 3d models for ships and rov (remotely operated vehicle)?

Thanks all.