Problem with render to texture for 3DRT

[postite]

I have a very simple scene with a bridge (img 1) with A&D mat, a daylight system and mr Photographic Exp. Control. Objects well unwarped.

 

No problem with normal renders.

 

When I use render to texture, I have a kind of big black spot on my texture (img 2) but nothing in the alpha (img 3). Not so nice in the 3DRT soft (img 4)...

 

-If I put a big box in place of the bridge ==> same problem on the box

-If I use skylight with Log. Exp. control ==> same problem

-If I use Standard Mat. ==> same problem

-If I use mental ray shader ==> same problem

 

Any idea? Because I don't know what to do...

 

ThX

Edited June 23, 2009 by postite

[postite]

Nobody has an idea ?

[postite]

Aaah It's ok now.

 

If anybody cares, it's because I used the sweep modifier to extrude the bridge. If I use loft to create the same shape, there is no problem.

I've made different tests, and there are always problems with sweep and rtt.

 

So don't use sweep modifier if you want to bake textures, don't know why...

Edited June 24, 2009 by postite