Keep up-to-date with Free tutorials!!

 

Sign up to our twice-monthly newsletter today for the latest tutorials, interviews and product information.

 

- Latest news
- Exclusive Shop Offers
- Preview early content
- Plus much more

 

Not Ready to take that step? OK, Why not just Subscribe to the RSS Feed

 
submit tutorial
1 | 2
Ambient Occlusion with Alpha

By Charanjeev Sawhney
| Your Rating:
rating star nonerating star nonerating star nonerating star nonerating star none
(0 Votes)
| 14550 Views
| 0 Comments
| Comments 0
Date Added: 9th December 2009
Software used:
3ds Max
531_tid_Render01.jpg
This tutorial is for all my 3d artist friends out there and it's all about using ambient occlusion in 3ds Max, with the help of just Mental Ray. Ambient occlusion is a widely used pass in the industry these days. There are many different ways to do this, but as per my experience with bigger scenes people generally face lots of problems, e.g. the crashing of scenes, alphas not generating properly for plants or any opaque objects. Another question is, which plug-in to use and how? Lately I have come across a better and crash proof technique using Mental Ray. Let's start with a simple scene in 3ds max. Below I have a simple scene set up with 3 just planes and a box (Fig01).

531_tid_Fig01.jpg
Fig. 01

Let's say I have some different materials applied to all the different objects and my planes have two different leaf textures, with alpha in the scene, as shown below (Fig02).

531_tid_Fig02.jpg
Fig. 02

Now open the render scene setup option and change the renderer from default scan line to mental ray renderer. Open the material editor and click on an empty slot. Then click on the get material and add an ambient/reflective occlusion map, as shown in Fig03.

531_tid_Fig03.jpg
Fig. 03


Here comes the real work! After adding this new map (ambient/reflective occlusion) to an empty slot, add this map to the self illumination slot to both the leaf materials (and any other material with alpha in scene). Be sure to use instance while dragging and dropping onto the slot. Turn off the colour map and change the colour slot for diffuse to pure white, as shown below in Fig04.

531_tid_Fig04.jpg
Fig. 04

Now add a new mental ray material to an empty slot with the ambient/reflective occlusion map added to its surface slot (use instance), as shown in Fig05 - 06 below.

531_tid_Fig05.jpg
Fig. 05



next page >
 
1 | 2
Related Tutorials

Tutorial

Gallery Image.



Keywords: scene, interior, texturing,

Go to tutorial
rating star fullrating star fullrating star fullrating star fullrating star none (8)
Comments 0 Views 24888

Tutorial

Gallery Image.



Keywords: maya, ambient, occlusion, ao, video,

Go to galleries 1
rating star fullrating star fullrating star fullrating star fullrating star full
Comments 2 Views 7594

Tutorial

Gallery Image.



Keywords: occlusion, pass, rendering,

Go to galleries 1
rating star nonerating star nonerating star nonerating star nonerating star none
Comments 0 Views 2837

Tutorial

Gallery Image.



Keywords: strokes, alphas, zbrush,

Go to galleries 1
rating star nonerating star nonerating star nonerating star nonerating star none
Comments 0 Views 4673
Readers Comments (Newest on Top)
no comments!
No comments yet. Be the first to comment!
Add Your Comment