illuminate a 3ds with radiance

radiance-general
1

Hello!

I need to illuminate a scene with radiance which does not only contain primitives (e.g. sphere) but some more complex models such a 3ds model.
That is, I need to do what is described in Debevec's IBL tutorial but instead to have spheres in the scene, i wolud like to have a 3ds model

As I understood so far from what I have read from web, is that I need to convert .3ds to .obj and then use obj2mesh radiance programm

Then I should use that mesh (lets sat output.rtm) in the scene (file: scene.rad) with this:

mod mesh id
1+ output.rtm [xform args]
0
0

I would like to know if this is the correct process or there is another way to illuminate a 3ds with radiance?
What about [xform args]. What I should write over there? Is anywhere that I can find a simple and complete example for illuminating scenes constist from more complex models?
Should I let 1+ and two zeros just as there are?

..Beside the help I need for the above, I would like to read "Real Pixels" Graphics Gem II. I' ve ty to find it in the web but waht I found are only many references about this paper. Can I found it anywhere online?

Thank you a lot,
Regards,
Despina

2

Despina,

You can convert almost any 3ds model directly into radiance:

3ds2mgf name.3ds

mgf2rad name.mgf > name.rad

now simply try:

objview name.rad

the rvu window should open showing the model illuminated by 3 light sources,

it's a quick and good check to start with.

Of everything is ok, you can now create in a separate file the sky,

When you have done you combine the two with:

oconv sky.rad name.rad > name.oct

and preview them with

rvu name.oct

now you just need to set up the view,

type v in the rvu window, select point and viewing direction...

good luck!

giulio

PS

this is quick but do not incorporates uv coordinates, only colours are
translated.

If you have textures and uv you may need to use obj2mesh

Once converted the model the syntax is:

void mesh example

7 modelname.mesh -rx 90 -t 10 10 10

0

0

Where:

7 is the number of inputs on the same line,

-rx 90 rotates the model by 90 degrees on the y axys

-t 10 10 10 translate the model from 0 0 0 to the point 10 10 10

When creating the mesh use:

obj2mesh -a materialfile objfile > meshfile

About that there is a quick tutorial I wrote at:

http://www.bozzograo.net/radiance/modules.php?op=modload
<http://www.bozzograo.net/radiance/modules.php?op=modload&name=Downloads&fil
e=index&req=viewdownload&cid=5>
&name=Downloads&file=index&req=viewdownload&cid=5

···

_____

From: radiance-general-bounces@radiance-online.org
[mailto:radiance-general-bounces@radiance-online.org] On Behalf Of Despina
Michael
Sent: 02 March 2005 12:33
To: Radiance general discussion
Subject: [Radiance-general] illuminate a 3ds with radiance

Hello!

I need to illuminate a scene with radiance which does not only contain
primitives (e.g. sphere) but some more complex models such a 3ds model.

That is, I need to do what is described in Debevec's IBL tutorial but
instead to have spheres in the scene, i wolud like to have a 3ds model

As I understood so far from what I have read from web, is that I need to
convert .3ds to .obj and then use obj2mesh radiance programm

Then I should use that mesh (lets sat output.rtm) in the scene (file:
scene.rad) with this:

mod mesh id
1+ output.rtm [xform args]
0
0

I would like to know if this is the correct process or there is another way
to illuminate a 3ds with radiance?

What about [xform args]. What I should write over there? Is anywhere that I
can find a simple and complete example for illuminating scenes constist from
more complex models?

Should I let 1+ and two zeros just as there are?

...Beside the help I need for the above, I would like to read "Real Pixels"
Graphics Gem II. I' ve ty to find it in the web but waht I found are only
many references about this paper. Can I found it anywhere online?

Thank you a lot,

Regards,

Despina

___________________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses.

3

On a separate but related note, is there some flag when using obj2rad or similar transformation which will instruct the renderer to smooth the face normals for converted mesh objects?

I recall seeing a "-s" option somewhere. The basic idea is, I have this externally modeled object, i convert it to obj, bring it into RADIANCE using obj2rad and then xform it into place. During the conversion, the object is made into a mesh and I would like the mesh to render smooth.

Thanks,

kirk

···

On Mar 2, 2005, at 8:22 AM, Giulio Antonutto wrote:

Despina,

You can convert almost any 3ds model directly into radiance:

3ds2mgf name.3ds

mgf2rad name.mgf > name.rad

now simply try:

objview name.rad

the rvu window should open showing the model illuminated by 3 light sources,

it's a quick and good check to start with.

Of everything is ok, you can now create in a separate file the sky,

When you have done you combine the two with:

oconv sky.rad name.rad > name.oct

and preview them with

rvu name.oct

now you just need to set up the view,

type v in the rvu window, select point and viewing direction...

good luck!

giulio

PS

this is quick but do not incorporates uv coordinates, only colours are translated.

If you have textures and uv you may need to use obj2mesh

Once converted the model the syntax is:

void mesh example

7 modelname.mesh -rx 90 -t 10 10 10

0

0

Where:

7 is the number of inputs on the same line,

-rx 90 rotates the model by 90 degrees on the y axys

-t 10 10 10 translate the model from 0 0 0 to the point 10 10 10

When creating the mesh use:

obj2mesh -a materialfile objfile > meshfile

About that there is a quick tutorial I wrote at:

http://www.bozzograo.net/radiance/modules.php?op=modload&name=Downloads&file=index&req=viewdownload&cid=5

From: radiance-general-bounces@radiance-online.org [mailto:radiance-general-bounces@radiance-online.org] On Behalf Of Despina Michael
Sent: 02 March 2005 12:33
To: Radiance general discussion
Subject: [Radiance-general] illuminate a 3ds with radiance

Hello!

I need to illuminate a scene with radiance which does not only contain primitives (e.g. sphere) but some more complex models such a 3ds model.

That is, I need to do what is described in Debevec's IBL tutorial but instead to have spheres in the scene, i wolud like to have a 3ds model

As I understood so far from what I have read from web, is that I need to convert .3ds to .obj and then use obj2mesh radiance programm

Then I should use that mesh (lets sat output.rtm) in the scene (file: scene.rad) with this:

mod mesh id
1+ output.rtm [xform args]
0

I would like to know if this is the correct process or there is another way to illuminate a 3ds with radiance?

What about [xform args]. What I should write over there? Is anywhere that I can find a simple and complete example for illuminating scenes constist from more complex models?

Should I let 1+ and two zeros just as there are?

...Beside the help I need for the above, I would like to read "Real Pixels" Graphics Gem II. I' ve ty to find it in the web but waht I found are only many references about this paper. Can I found it anywhere online?

Thank you a lot,

Regards,

Despina

___________________________________________________________________

Electronic mail messages entering and leaving Arup business

systems are scanned for acceptability of content and viruses.
_______________________________________________
Radiance-general mailing list
Radiance-general@radiance-online.org
http://www.radiance-online.org/mailman/listinfo/radiance-general

4

There are at least three different approaches:

obj2rad takes into account normals (if your program exports them properly)
unless you use the -f option (flat faces) - generates a RAD file (you can
compile and use instances)

ob2mesh does the trick - generates a MESH file (you need the mesh primitive)

3ds2mgf does the trick - generates a RAD file (you can compile and use
instances)

I always prefer to use 3ds2mgf for quick things, like if I want to render
something with colors and smoothing without bothering about reflectance of
materials

I use obj2rad if I want to edit the material description properly

(for Cinema4d you need to xform the model to change Y and Z and smoothing do
not seem to work, don't know why...

It works well with FormZ though... boh! Mysteries of 3D world)

I use obj2mesh if there are complicate textures to consider.

All of them refer to tmesh.cal and surf.cal into your lib folder.

A quick note: the -s option you recall is used by gensurf to add smoothing
to your procedurally generated surface (not imported form any CAD).

Hope it helps,

giulio

···

_____

From: radiance-general-bounces@radiance-online.org
[mailto:radiance-general-bounces@radiance-online.org] On Behalf Of Kirk
Thibault
Sent: 02 March 2005 14:13
To: Radiance general discussion
Subject: Re: [Radiance-general] illuminate a 3ds with radiance

On a separate but related note, is there some flag when using obj2rad or
similar transformation which will instruct the renderer to smooth the face
normals for converted mesh objects?

I recall seeing a "-s" option somewhere. The basic idea is, I have this
externally modeled object, i convert it to obj, bring it into RADIANCE using
obj2rad and then xform it into place. During the conversion, the object is
made into a mesh and I would like the mesh to render smooth.

Thanks,

kirk

On Mar 2, 2005, at 8:22 AM, Giulio Antonutto wrote:

Despina,

You can convert almost any 3ds model directly into radiance:

3ds2mgf name.3ds

mgf2rad name.mgf > name.rad

now simply try:

objview name.rad

the rvu window should open showing the model illuminated by 3 light sources,

it's a quick and good check to start with.

Of everything is ok, you can now create in a separate file the sky,

When you have done you combine the two with:

oconv sky.rad name.rad > name.oct

and preview them with

rvu name.oct

now you just need to set up the view,

type v in the rvu window, select point and viewing direction...

good luck!

giulio

PS

this is quick but do not incorporates uv coordinates, only colours are
translated.

If you have textures and uv you may need to use obj2mesh

Once converted the model the syntax is:

void mesh example

7 modelname.mesh -rx 90 -t 10 10 10

0

0

Where:

7 is the number of inputs on the same line,

-rx 90 rotates the model by 90 degrees on the y axys

-t 10 10 10 translate the model from 0 0 0 to the point 10 10 10

When creating the mesh use:

obj2mesh -a materialfile objfile > meshfile

About that there is a quick tutorial I wrote at:

http://www.bozzograo.net/radiance/modules.php?op=modload&name=Downloads&file
=index&req=viewdownload&cid=5

From: radiance-general-bounces@radiance-online.org
[mailto:radiance-general-bounces@radiance-online.org] On Behalf Of Despina
Michael

Sent: 02 March 2005 12:33

To: Radiance general discussion

Subject: [Radiance-general] illuminate a 3ds with radiance

Hello!

I need to illuminate a scene with radiance which does not only contain
primitives (e.g. sphere) but some more complex models such a 3ds model.

That is, I need to do what is described in Debevec's IBL tutorial but
instead to have spheres in the scene, i wolud like to have a 3ds model

As I understood so far from what I have read from web, is that I need to
convert .3ds to .obj and then use obj2mesh radiance programm

Then I should use that mesh (lets sat output.rtm) in the scene (file:
scene.rad) with this:

mod mesh id

1+ output.rtm [xform args]

0

0

I would like to know if this is the correct process or there is another way
to illuminate a 3ds with radiance?

What about [xform args]. What I should write over there? Is anywhere that I
can find a simple and complete example for illuminating scenes constist from
more complex models?

Should I let 1+ and two zeros just as there are?

...Beside the help I need for the above, I would like to read "Real Pixels"
Graphics Gem II. I' ve ty to find it in the web but waht I found are only
many references about this paper. Can I found it anywhere online?

Thank you a lot,

Regards,

Despina

___________________________________________________________________

Electronic mail messages entering and leaving Arup business

systems are scanned for acceptability of content and viruses.

_______________________________________________

Radiance-general mailing list

Radiance-general@radiance-online.org

http://www.radiance-online.org/mailman/listinfo/radiance-general

___________________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses.

5

Thank you very much for your useful advice. They are very helpful!
I'll give it a try.

Can anyone tell me where I can find "Real Pixels" in an electronic version?
I have searched the web but I did't find the paper.

Despina

···

----- Original Message -----
  From: Giulio Antonutto
  To: 'Radiance general discussion'
  Sent: Wednesday, March 02, 2005 3:22 PM
  Subject: RE: [Radiance-general] illuminate a 3ds with radiance

  Despina,

  You can convert almost any 3ds model directly into radiance:

  3ds2mgf name.3ds

  mgf2rad name.mgf > name.rad

  now simply try:

  objview name.rad

  the rvu window should open showing the model illuminated by 3 light sources,

  it's a quick and good check to start with.

  Of everything is ok, you can now create in a separate file the sky,

  When you have done you combine the two with:

  oconv sky.rad name.rad > name.oct

  and preview them with

  rvu name.oct

  now you just need to set up the view,

  type v in the rvu window, select point and viewing direction...

  good luck!

  giulio

  PS

  this is quick but do not incorporates uv coordinates, only colours are translated.

  If you have textures and uv you may need to use obj2mesh

  Once converted the model the syntax is:

  void mesh example

  7 modelname.mesh -rx 90 -t 10 10 10

  0

  0

  Where:

  7 is the number of inputs on the same line,

  -rx 90 rotates the model by 90 degrees on the y axys

  -t 10 10 10 translate the model from 0 0 0 to the point 10 10 10

  When creating the mesh use:

  obj2mesh -a materialfile objfile > meshfile

  About that there is a quick tutorial I wrote at:

  http://www.bozzograo.net/radiance/modules.php?op=modload&name=Downloads&file=index&req=viewdownload&cid=5

------------------------------------------------------------------------------

  From: radiance-general-bounces@radiance-online.org [mailto:radiance-general-bounces@radiance-online.org] On Behalf Of Despina Michael
  Sent: 02 March 2005 12:33
  To: Radiance general discussion
  Subject: [Radiance-general] illuminate a 3ds with radiance

  Hello!

  I need to illuminate a scene with radiance which does not only contain primitives (e.g. sphere) but some more complex models such a 3ds model.

  That is, I need to do what is described in Debevec's IBL tutorial but instead to have spheres in the scene, i wolud like to have a 3ds model

  As I understood so far from what I have read from web, is that I need to convert .3ds to .obj and then use obj2mesh radiance programm

  Then I should use that mesh (lets sat output.rtm) in the scene (file: scene.rad) with this:

  mod mesh id
  1+ output.rtm [xform args]
  0
  0

  I would like to know if this is the correct process or there is another way to illuminate a 3ds with radiance?

  What about [xform args]. What I should write over there? Is anywhere that I can find a simple and complete example for illuminating scenes constist from more complex models?

  Should I let 1+ and two zeros just as there are?

  ...Beside the help I need for the above, I would like to read "Real Pixels" Graphics Gem II. I' ve ty to find it in the web but waht I found are only many references about this paper. Can I found it anywhere online?

  Thank you a lot,

  Regards,

  Despina

  ___________________________________________________________________

  Electronic mail messages entering and leaving Arup business

  systems are scanned for acceptability of content and viruses.

------------------------------------------------------------------------------

  _______________________________________________
  Radiance-general mailing list
  Radiance-general@radiance-online.org
  http://www.radiance-online.org/mailman/listinfo/radiance-general