[giacob]

look at the bottom left




it is the first time it happen to me... ( it is not e cooperative render)

[tom]

Have a look at these posts:

http://www.maxwellrender.com/forum/view ... hp?t=18747
http://www.maxwellrender.com/forum/view ... 048#276048

[giacob]

i used single face as emitter.... i render this scene before and that didnt happened

[tom]

If you have the scene always causing this at the moment, feel free to send it to me.

[av]

Hi Tom

I've been having the same problem after 1.7

After several tests it seems that the problem occurs (it's most noticeable) when a emitter (single face 2d surface) has a high number of edges.

To solve this problem this emitters need to be triangulated.


As an example I've made this simple test scene in formZ with just a 3D enclosure for the "room" (default mxm) and four 2d surfaces (emitters), a rectangle, a 12 edge surface, a 36 edge surface (circle) and a 128 edge surface (circle), all with jomaga's sodium high pressure 1000w mxm applied.

 


The only diference between the two scenes is that the emitters are triangulated.

Top view of the emitters:
 



This test renderings are all sl8 (with multilight), directly from formZ 6.5.6 (plugin 1.7.0.4) to mxcl 1.7.0.1 in a macpro with osX 10.5.3

paulo

[Bubbaloo]

No pictures are showing from that last post...

Edit: Now they are.

Good tests. Seems this is a very important step.

[av]

Alternate links for the images from my previous post

Single face emitters


Triangulated emitters


Wireframe Top view of emitters (single face)


Wireframe Top view of emitters triangulated


thanks Bubbaloo

paulo

[tom]

After several tests it seems that the problem occurs (it's most noticeable) when a emitter (single face 2d surface) has a high number of edges.

Yes, I've said the same above

[flycast]

What does triangulated mean? How does one triangulate a flat plane emmiter imported from Maxwell's primitives in studio?

[-Adrian]

Triangulation divides polygons, until everything is made of triangles. That's what all render engines work with, even the OpenGL view in your 3d app.

If you use a polygon modeler there's definitely a triangulation feature in it. If you export to Maxwell from a Nurbs app, this should be done automatically. Afaik only MoI can export Nurbs to quad polys.

[flycast]

Thanks for the explanation Adrian. So the question still remains...How do I triangulate using Maxwell studio when I have imported primitives plane from their set of primitives?

[pwrdesign]

I dont know if I've missed something in this thread, but you should NOT have your emitters triangulated like that, thats what causing the errors in your render.


Regards Patrik