need some information on this tutorial

[chow choppe]

i

 

was reading this wonderful tutorial

 

http://area.autodesk.com/index.php/tutorials/tutorial_index/exterior_scene_part_3_lighting/P10/

 

i havent understood the compositing part

that is how reflection or specular passes helpful?

and how to use them in photoshop?

do i save it as separate jpegs? because when i render passes they each render as different images

 

what about dirt map

 

Can anyone throw more light on this

 

Thanks

[chow choppe]

so many views but no replies?

:-(

[shaneis]

You shouldn't be rendering directly to a JPEG format as they are compressed, so you instantly lose rendered information in the image upon saving. Try a "lossless" format like TIFF or TGA. Better still, use a 32-bit format like openEXR for example. Once you've finished the image, then convert to jpg. This tutorial will give you some ideas about how you can composite your images onto stock backgrounds as well (which refers to your "Chinese Renderings" posts)...

 

http://www.stockvault.net/tutorials/from_3d_studio_max_to_adobe_photoshop.php

 

This should help you with the blend modes and usage of images made in various render passes.

 

http://www.aecbytes.com/tipsandtricks/2007/issue21-Compositing3D.html

 

Play around with the processes and find a workflow that gets results that you like.

 

All the best,

 

S.

[chow choppe]

you r the man shane

i knew about the first link and use of alpha in compositing

checking out the second link now

[konstantin]

Have you read "Exterior Scenes Part 4 – Rendering and Post"?

[chow choppe]

No

where is it man?

[chow choppe]

oh

i think they just posted it

wasnt there yesterday

thanks

[chow choppe]

Just went thru that part 4

I havent understood the concept of matte

 

from the tutor?ial

 

" mattes quickly become your best friend when doing a lot of post or “paint” work in Photoshop. They render quickly (for the most part) so here again we usually create a list of objects that we’re planning on affecting in one way or another during the post process. Usually the most prevalent surfaces/objects get their own mattes automatically: glass, walls, floor surfaces, etc. For this process we create a copy of our working file so that we can apply the appropriate materials to render our mattes. "

 

does this mean that if i want my green area to be separated so that i am able to select it easily in post and add some grass texture to it i save a separate copy of file

apply the self illuminated standard material to the grass object and matte material to the rest of the scene?

 

havent understood it completely.

 

Also if i do a reflection pass and save it as separate tif

what i can do with that during compositing?