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Need some help with 3d studio and shadows
Tag_Astro0
Posts: 0Member
Hi all,
I've a little problem with 3d studio 7...
I try to explain it : i'm trying to make a video with my starship Ere du Verseau(as maybe somebody have seen recently here...) The scene is quite simple : the starship, a starfield made with particules, and only a cam.
On the starship I've put 4 omni lights and 3 spotlights that cast are shadow(with light as simple, and not rectangular or others options...) These light use far attenuation...
I have two lights with advanced ray tracer shadow to illuminate the starship, and the antialising is on simple.
I have a sky light...
For the render of still images, i've got no problems as you can see ont the post concerning the Ere du Verseau... even in high resolution, even with the skylight casting shadows...
But for the animation, 3d studio failled at some pictures, even if the skylight doesn't cast shadow...
For some pictures of the animation, I've got no problem and the image is rendered in a few minutes...
But when 3ds failled, I've often the message that says that the program is out of memory...
This morning I subsitute the two advanced ray tracers shadow by two areas shadows... but 3ds failled again after rendering some pictures without problems...
So my question is : what is the best way to got no problems with shadows but keep a good quality of render ? What kind of shadows may I try ?
Can some render plugins avoid to 3ds to render correctly my pictures without bugs and in a reasonnable time ?
I've got a little more than 1Go of ram on my pc...
I thank all people whot could help me because I'm :mad:
Thanx again
Tag
I've a little problem with 3d studio 7...
I try to explain it : i'm trying to make a video with my starship Ere du Verseau(as maybe somebody have seen recently here...) The scene is quite simple : the starship, a starfield made with particules, and only a cam.
On the starship I've put 4 omni lights and 3 spotlights that cast are shadow(with light as simple, and not rectangular or others options...) These light use far attenuation...
I have two lights with advanced ray tracer shadow to illuminate the starship, and the antialising is on simple.
I have a sky light...
For the render of still images, i've got no problems as you can see ont the post concerning the Ere du Verseau... even in high resolution, even with the skylight casting shadows...
But for the animation, 3d studio failled at some pictures, even if the skylight doesn't cast shadow...
For some pictures of the animation, I've got no problem and the image is rendered in a few minutes...
But when 3ds failled, I've often the message that says that the program is out of memory...
This morning I subsitute the two advanced ray tracers shadow by two areas shadows... but 3ds failled again after rendering some pictures without problems...
So my question is : what is the best way to got no problems with shadows but keep a good quality of render ? What kind of shadows may I try ?
Can some render plugins avoid to 3ds to render correctly my pictures without bugs and in a reasonnable time ?
I've got a little more than 1Go of ram on my pc...
I thank all people whot could help me because I'm :mad:
Thanx again
Tag
Post edited by Tag_Astro on
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Posts
this work just as fine as the complex shadows, the trick is to tweak them correctly.
down in the shadowmap parametres, change the bias to 0. and the other param (the one that is preset on 4. cant remember the name and i dont want to turn max on now), set it to 8 or 10. this will blur the shadow. the highest the bluriest.
if you ant to use a skylight, make sure that you use the scanline.
then, in the advanced illumination tab, click the light tracer. on the 250 setting, turn it down, you wont see any difference.
lower the sampler (the 1/16 thing) put it to something lower.
now, if evry thing seems ok, or if you hate shadowmaps
make sure that you didnt animate your lights.
and dont use vray.
i hate vray.
But as I knew, shadow maps don't seem to cast shadows from some of objects, as on the two pictures below. The first one is made with a shadow map from the principal light, and the other with advanced ray traced shadows. In the red zone on the first picture, we can see that there are no shadows casting on the ship by some of his parts... But on the second, we can see shadows casting.
Thanx again, I'll try with keeping the advanced ray traced shadows on the principal light(that is not animated) and shadows map on all others light from the scene and I'm going to render the anim... We will see if it works or not.
If anybody else have tips or advices, I'll be happy to read them
Thanx again.
Tag
Try my sig url and give the lighting tut a go. The lack of cast shadows seems to me that some objects are set with a certian setting Either in materials or the objects themselfs.
Ray trace is only useful if your USING anything that makes use of it. Such as reflected materials (a mirrior etc) For plain old shadows I would avoid ray trace anything. The skylight you have might be causing issues as well depending on filters or other options.
Tag
try this url instead
Any of the shadow systems are good. Some work better than others. Biggest tip I could lend is to avoid mixing types up.
I havent a clue why the ray traced shadows are giving you grief but for the scene you posted there is no logial reason to use them. The shadows failing with shadowmaps leads me to belive there is something wrong with the way the scene is set up. Only way to decern this is to systematicly tear the scene apart.
Here are some basic examples
skylight with default shadows used within the lights settings , if you drop the ray settings the grainer it gets as the render times drop. Very slow renders. 5min on the laptop
Skylight with lighttracer used (see setings on my site) 18sec
Skylight with shadowmaps default 18sec note the jaggy edges in the shadows
Ajusted shadowmaps. 22sec
Skylight with area shadows 22sec
Ray Traced
as you can see all ray does is make a harsh unrealistic shadow.
I plan to expand the lighting tuts and reasons to and not to use a specific "type" either way hope you get the crashes fixed.
It can do speciual thing but for basic shadows its uneeded. I would as well try to avoid mixing shadow types, this might be the problem, Im not sure though I have mixed shadowmaps and area shadows in the past mainly because area does some wierd things in confined bright spaces.
That still seems to me very very strange...
Tag
If these fail try merging in the objects from your old scene one by one into a new one rendering between.
Beyond that I am at a los lol since it could be any number of things at this stage.
does max crash with other scenes or objects?
That makes me crazy!!!
Tag
maybe someone skilled in animation can chime in as well?? >_>
Tag
always render to image`s so that if you have a crash you can start from where it stopped
*.Tga is the a good image file to go with
Tag
Tag
After a night trying to find why 3ds crashed and trying to fix the problem, and after crying and shouting and breaking all at home, I find a solution. With two areas shadows for the global lightning, a skylight with no shadows cast and shadow map for the starship light, it seems to work... I'm saved, and I find that area shadows are quite good than raytraced shadows
Thanx for all for your advices
Tag