A problem with dark spots (bad polygons?). Help!

[dandi8]

Hey guys! I've decided to try my hand at modelling cars.
Here's a pic:
http://img187.imageshack.us/img187/5483/buszi5.png


As you can see I've got a dark spot on my model (I think it's called bad polygons or something?). So my question is - how should I lay the edges so that it disappears?

[kim aldis]

the polygon there is non-planar. Aside from the shading issues it also looks like it's causing depth sort problems.

[dandi8]

And how do I make it planar?
Sorry, I'm still a noob in XSI ^^

[Cryrid]

Try adjusting this guy a bit
http://cryrid.com/images/temp/xsi_poly.jpg

[kim aldis]

Non-planar means it's not flat. CGI doesn't deal well with polygons that aren't flat. You can either move points around until it is flat or split the polygon.

[dandi8]

Thanks! It worked :-)