Imported model problem

pwharton · March 22nd, 2008

This rendering is of a car I downloaded and imported from sketchup and added the A&D car paint materials on it to play with. The model has it problems but the strange thing is when I render it from the front I get the black triangles around the door. Same model from the side view and they disappear. Does anybody know what that is about?

Claudio Branch · March 23rd, 2008

Quote:

Originally Posted by pwharton

The model has it problems but the strange thing is when I render it from the front I get the black triangles around the door. Same model from the side view and they disappear. Does anybody know what that is about?

Did you check these surfaces for duplicate faces?

SandmanNinja · March 23rd, 2008

I agree with Claudio - that's usually a sign of bad geometry. i.e. flipped normals or co-planar faces (2 faces in the same space).

Go to Poly/Face select mode and select the offending tri's and delete them. See if the weirdness goes away.

pwharton · March 24th, 2008

I tried erasing them and that just left holes, I then tried flipping the normals and it still renders strange. Maybe I am doing something wrong? Also what’s with the big gap at the front of the door? on the model it looks flush with the surrounding mesh.

pwharton · March 24th, 2008

Forgot to add the screen grab....

rogue3d · March 25th, 2008

Quote:

Originally Posted by pwharton

This rendering is of a car I downloaded and imported from sketchup and added the A&D car paint materials on it to play with. The model has it problems but the strange thing is when I render it from the front I get the black triangles around the door. Same model from the side view and they disappear. Does anybody know what that is about?

IMHO, importing from sketchup into viz/max has always been a game of roulette......never comes in clean only by freak chance. the normals may need to be flipped and then smoothed. so play with your smoothing groups. also welding of verts. that black area may be multiple verts on top of each other that need to be welded then smoothed.

In the end I've always found it easier to build from scratch in viz because until I fix/correct all the problems from importing I could have just built it cleaner to begin with.

Claudio Branch · March 25th, 2008

Quote:

Originally Posted by pwharton

I tried erasing them and that just left holes, I then tried flipping the normals and it still renders strange. Maybe I am doing something wrong? Also what’s with the big gap at the front of the door? on the model it looks flush with the surrounding mesh.

At this point, you probably should just delete the offensive geometry and manually remodel that area...

pwharton · March 26th, 2008

I was hoping not to, but its looks like that is what I am going to have to do.

Thanks for all you help with this one.

RAYMOND · April 3rd, 2008

is your mapping 2 sided.

r

March 23rd, 2008	#3 (permalink)
SandmanNinja Moderator Join Date: Mar 2007 Location: Ballarat, Victoria, Australia Posts: 1,079 Name: Joel Callahan	Re: Imported model problem I agree with Claudio - that's usually a sign of bad geometry. i.e. flipped normals or co-planar faces (2 faces in the same space). Go to Poly/Face select mode and select the offending tri's and delete them. See if the weirdness goes away. __________________ -SandmanNinja website

March 24th, 2008	#4 (permalink)
pwharton Member Join Date: Jan 2006 Location: Chicago, IL. Posts: 47 Name: Phillip Wharton	Re: Imported model problem I tried erasing them and that just left holes, I then tried flipping the normals and it still renders strange. Maybe I am doing something wrong? Also what’s with the big gap at the front of the door? on the model it looks flush with the surrounding mesh.

March 26th, 2008	#8 (permalink)
pwharton Member Join Date: Jan 2006 Location: Chicago, IL. Posts: 47 Name: Phillip Wharton	Re: Imported model problem I was hoping not to, but its looks like that is what I am going to have to do. Thanks for all you help with this one.

April 3rd, 2008	#9 (permalink)
RAYMOND Senior Member Join Date: Jun 2005 Location: Honolulu Age: 63 Posts: 351 Name: Raymond Salmon	Re: Imported model problem is your mapping 2 sided. r

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