Let There Be Light II

nisus · December 23rd, 2002

Hi all,

I started this second edition of "Let There Be Light" on the request of Ernest Burden III.

(Maybe we should make a new section for these reasearches like I suggested in 'new forums' before ... Jeff? (tnx!))

rgds

nisus

Ernest Burden · December 23rd, 2002

I split this off the existing thread since it's a different model (see below).

I decided to take a try at a highly optomized version of the basic model posted for these tests. I rebuilt the model on a strict module. Almost every polygon in this model is .5 meters x .5 meters, with a small number at .5x.25m The model is metric and in DXF format, NO triangles. No real-world model would be so optomized, of course.

MODEL2.zip

I am setting my meshing to a med/high value, processed the light to about 90% in 1 1/2 hours on my Athlon 1G/512MB RAM

For consistency's sake, I suggest anyone using the new model render a view from:

camera x, 1 y, -5 z, 1.4
target x, 3 y, 10 z, 1.4
view angle 76 degrees
rendered to 720x486

that's what I used

sun is still at 346/23 (or 194/23 for Lightscape)

Because the proportions changed a bit when I re-did this, the light hits at different points, but I like it because it hits all on a wall so most of the light on the floor is bounced.

Here is the indirect only.

and the final render

ingo · December 23rd, 2002

Just curious Ernest, why ? Why this strange optimization ?

Ernest Burden · December 23rd, 2002

Whadda mean, 'strange'?

Quads are the holy grail of radiosity engines! My model is ALL quads. Let's see if it make any difference at all from the earlier model which was not optomized for GI.

Also, I tried to force all polys to be the same size since I noticed that I, and others, had artifacts where the neighboring polys were different sizes.

Quote:

Just curious Ernest, why this strange optimization ?

ingo · December 23rd, 2002

Quote:

Quads are the holy grail of radiosity engines! My model is ALL quads. Let's see if it make any difference at all from the earlier model which was not optomized for GI.

Also, I tried to force all polys to be the same size since I noticed that I, and others, had artifacts where the neighboring polys were different sizes.

Thats what i mean with strange. I've heard and seen that especially Lightscape is very demanding in modelling, but nothing that strange. I only know that its good to split large polygons into smaller ones to get a rendering faster, but if they are different size or not doesn't matter. But i'll give it a try.

siliconbauhaus · January 30th, 2003

I've been playing with ls using this model.....I got great lighting and shadow.....but my renders all come out with some serious jaggies......need to go find my ls manual

:/

Ernest Burden · January 30th, 2003

Quote:

.....but my renders all come out with some serious jaggies....

In raytraced views? Are you 'raytracing direct lighting', and have the sun set to raytrace direct? Post a picture!

siliconbauhaus · January 31st, 2003

here's my image.....obviously doing something wrong though

oh and I couldnt get a background colour to appear either

December 23rd, 2002	#1 (permalink)
nisus Super Moderator Join Date: Mar 2002 Location: Gent Flanders Belgium Europe Age: 32 Posts: 3,276 Name: Evert Vandenberghe	Hi all, I started this second edition of "Let There Be Light" on the request of Ernest Burden III. (Maybe we should make a new section for these reasearches like I suggested in 'new forums' before ... Jeff? (tnx!)) rgds nisus __________________ www.ams.be / www.nisusarts.com http://www.youtube.com/profile_videos?user=nisusCGA&p=r

December 23rd, 2002	#2 (permalink)
Ernest Burden Veteran Member Join Date: Apr 2002 Location: Ossining, NY USA Posts: 4,999 Name: Ernest Burden III	I split this off the existing thread since it's a different model (see below). I decided to take a try at a highly optomized version of the basic model posted for these tests. I rebuilt the model on a strict module. Almost every polygon in this model is .5 meters x .5 meters, with a small number at .5x.25m The model is metric and in DXF format, NO triangles. No real-world model would be so optomized, of course. MODEL2.zip I am setting my meshing to a med/high value, processed the light to about 90% in 1 1/2 hours on my Athlon 1G/512MB RAM For consistency's sake, I suggest anyone using the new model render a view from: camera x, 1 y, -5 z, 1.4 target x, 3 y, 10 z, 1.4 view angle 76 degrees rendered to 720x486 that's what I used sun is still at 346/23 (or 194/23 for Lightscape) Because the proportions changed a bit when I re-did this, the light hits at different points, but I like it because it hits all on a wall so most of the light on the floor is bounced. Here is the indirect only. and the final render __________________ Ernest Burden III AcmeDigital architectural rendering

December 23rd, 2002	#3 (permalink)
ingo Veteran Member Join Date: Sep 2002 Location: Hamburg, mostly harmless Posts: 642 Name: ingo M	Just curious Ernest, why ? Why this strange optimization ? __________________ ingo *** www.im-graphics.com

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

January 30th, 2003	#6 (permalink)
siliconbauhaus Senior Member Join Date: Jan 2003 Location: hagerstown md Posts: 203 Name: patrick anderson	I've been playing with ls using this model.....I got great lighting and shadow.....but my renders all come out with some serious jaggies......need to go find my ls manual :/

January 31st, 2003	#8 (permalink)
siliconbauhaus Senior Member Join Date: Jan 2003 Location: hagerstown md Posts: 203 Name: patrick anderson	here's my image.....obviously doing something wrong though oh and I couldnt get a background colour to appear either

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)