COMBINING PHONG SMOOTHING AND UV BITMAP MAPPING AT FACE LEVEL

radiance-general
1

Dear RADIANCE users

Thank you for your assistance with my previous request.

I have been attempting to combine two useful rendering features of
RADIANCE: phong smoothing and UV bitmap mapping at face level.

The techniques at achieving either have been established, but I
have attempted to bring them both together to refine the quality of RADIANCE
renders. I generally use RADIANCE for architectural illustration work and I
am attempting to derive the most out its material rendering capabilities.

Please visit the following hyperlink on my Internet site to view a gallery
of my rendering attempts and the problem discussed in greater detail.
(Previous problems with my Internet site have been corrected).

www.daiservices.btinternet.co.uk/Radiance/Radiance_v3_5_UNIX/Phong_shading_a
nd_bitmap_textures/Phong_shading_and_bitmap_textures.htm

Assistance from users is most appreciated.

Kind regards

John MacKenzie Graham
Digital Architectural Illustration Services
daiservices@btinternet.com

2

Hi John,

If you can run Radiance 3.5 on Unix, you will have access to the
new "mesh" primitive, which permits both (u,v) local coordinate
mapping and Phong surface normal interpolation. You can convert
from Wavefront .OBJ files using the new "obj2mesh" program. See
the following link for details:

  http://radsite.lbl.gov/radiance/man_html/obj2mesh.1.html

Unfortunately, there is a bug in the official 3.5 release in
the index computation for (u,v) coordinates, and you will need
to download and compile the most recent version of the source
code from radiance-online to get this to work:

  http://www.radiance-online.org/software/

It does not compile on Windows currently, so if you require
a working Windows version, you'll have some time to wait...

-Greg

Quoting Digital Architectural Illustration Services
<Daiservices@btinternet.com>:

···

Dear RADIANCE users

Thank you for your assistance with my previous request.

I have been attempting to combine two useful rendering features of
RADIANCE: phong smoothing and UV bitmap mapping at face level.

The techniques at achieving either have been established, but I
have attempted to bring them both together to refine the quality of RADIANCE
renders. I generally use RADIANCE for architectural illustration work and I
am attempting to derive the most out its material rendering capabilities.

Please visit the following hyperlink on my Internet site to view a gallery
of my rendering attempts and the problem discussed in greater detail.
(Previous problems with my Internet site have been corrected).

www.daiservices.btinternet.co.uk/Radiance/Radiance_v3_5_UNIX/Phong_shading_a
nd_bitmap_textures/Phong_shading_and_bitmap_textures.htm

Assistance from users is most appreciated.

Kind regards

John MacKenzie Graham
Digital Architectural Illustration Services

3

Dear Greg

Thank you for your assistance with my request concerning smoothing and UV
bitmap mapping on meshes in RADIANCE renders.

I have just updated my web page again with a new render and further
queries about using OBJ2MESH. Please can RADIANCE users visit the web page
(below) to view the discussion and view the new image update.

www.daiservices.btinternet.co.uk/Radiance/Radiance_v3_5_UNIX/Phong_shading_a
nd_bitmap_textures/Phong_shading_and_bitmap_textures.htm

Kind regards

John MacKenzie Graham
Digital Architectural Illustration Services
daiservices@btinternet.com