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1.x strange sunlight distribution
Posted: Mon May 28, 2007 12:48 pm
by fractrix
Hey everybody !
I have some strange behaviour of the sun in a simple test scene I did. I made a 5km x 5km displaced cube as a landscape testdummy and shoot up a render and got this:
Why is this happening ? Shouldn't the sun emit almost parallel light even with objects this big ???
How can I achieve 'normal' sunlight distribution ?!?
Posted: Mon May 28, 2007 2:26 pm
by tom
Can you tell more about your scene and positions of your objects/camera etc. I see no sunlight in this scene but something like an emitter.
Posted: Mon May 28, 2007 2:40 pm
by fractrix
This emitter is the sunlight ! What am I doing wrong ?
Could I send you the scene-file ?
Thank you !
Posted: Mon May 28, 2007 2:42 pm
by fractrix
I uploaded the scene file here:
http://uploaded.to/?id=gqhx0b
Posted: Mon May 28, 2007 3:00 pm
by KurtS
I've had similar problems with very large scenes. Or when objects are very far form eachother it looks like one object can appear outside the area the maxwell sun can reach?
Posted: Mon May 28, 2007 3:08 pm
by janosch1234
if you change
pivot y value to 0 (you have -34.166 meters there)
and after that y geometry position to 0
then it renders ok here.
Regards
Jan
Posted: Mon May 28, 2007 3:14 pm
by jomaga
You should check your scale, the object is actually 50kmx50km wide
Posted: Mon May 28, 2007 3:16 pm
by fractrix
janosch1234 wrote:if you change
pivot y value to 0 (you have -34.166 meters there)
and after that y geometry position to 0
then it renders ok here.
Sorry, but then the sun is on the underside of the object !!!
Just render a view of the bottom side !
Posted: Mon May 28, 2007 3:18 pm
by tom
Thanks for the scene fractrix. Your object is 50 km x 50 km which is quite big for common purpose but sunlight shouldn't fail anyway. If that's not a limitation of the current system, I would call it's a bug. We'll check this and let you know.
Posted: Mon May 28, 2007 3:18 pm
by fractrix
jomaga wrote:You should check your scale, the object is actually 50kmx50km wide
Yes, you are right ! Just found out. Must be an import (vue) problem. But thats still strange. Sun should give almost parallel light, shouldn't it ?
Posted: Mon May 28, 2007 3:20 pm
by fractrix
tom wrote:Thanks for the scene fractrix. Your object is 50 km x 50 km which is quite big for common purpose but sunlight shouldn't fail anyway. If that's not a limitation of the current system, I would call it's a bug. We'll check this and let you know.
Thank you very much, tom !!! I just try to fake a sun with an emitter far away, but that seems not so easy ...
Posted: Mon May 28, 2007 3:24 pm
by tom
fractrix wrote:Thank you very much, tom !!! I just try to fake a sun with an emitter far away, but that seems not so easy ...
Why do you do that? Do you seriously need rendering a 50 km x 50 km landscape? If yes, that's ok.
Posted: Mon May 28, 2007 5:36 pm
by fractrix
tom wrote:fractrix wrote:Thank you very much, tom !!! I just try to fake a sun with an emitter far away, but that seems not so easy ...
Why do you do that? Do you seriously need rendering a 50 km x 50 km landscape? If yes, that's ok.
No, the whole story is, I did a landscape test render a while ago in Maxwell RC5, and today I thought I could work it out a bit with the new version. Then I found I was not able to get the same 'natural' look. So I did this additional test and it was exported 10 times bigger out of vue and then I found this strange sun behaviour. It seems related to my problem of getting the look I already got.
