Greetings. Every time I render after using the shell modifier I get this pop up and render discontinues.

has a mesh with invalid texture vertex indices - can’t render

Any work arounds or ideas?

Thank-you.

Hello Wolf,

I just applied a shell modifier to a plane and to a rectanglular spline and it rendered fine here.

A few clues might be useful…

Max standard or design, 32/64 bit?
OS and 32/64 bit?
What renderer?
What materials (if any)?
A sample scene (zipped) would help as well.

Max 4.2 through 2013.
XP-64 (SP2)
NVidia 9800GTX-512 (Driver 266.58).
Core 2 Quad Q6600 2.4GHz, 8Gb Ram, DX9.0c.

max standard. Default renderer. base material. 64bit Vista. A new primitive will render with shell modifier, but after creation specific (complex) geo does not.

Thanks.

Putting an epoly mod on top fixed it. Looking at the objects channel info showed there were some dead verts in alpha and illum channels, although I’m not really clear on what that means, I’m guessing it’s related to your problem.

Also, I noticed that the numbers of dead verts changed when they shouldn’t have. ie the second time I opened the file I got different numbers, going down and back up the stack, etc. Changing the shell edge mapping also (as expected) brought different results, but even those were inconsistent.

So I’d say there might be a bug in there somewhere, but I’d be more interested in knowing how that geometry was created in the first place. As you said, a new plane will shell properly, so the question remains, what “complex” procedure did you follow for the simple plane in your scene?

Max 2009, 2010 32/64
VistaP 64 SP1
Intel Q9550 8GB
ATI 4870x2
Patriot 128GB SSD

Thanks. That helps a lot. Worked shift-extend from primitives. No modifiers but shell through several iterations of max.