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Author
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Topic: two-sided polys?
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charmstar
Pilot
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posted 02-14- 02:36 PM
   
OK, I don't know if this has been covered before, but I can't get it to work right! Basically, in Max I choose edit mesh, and then select the poly sub-object. I choose create, and then I click the proper vertices first counterclockwise, and then again clockwise. This creates two polys, with normals facing opposite ways. I texture them one at a time, and export to OBJ. However, if I import the obj back into max, or if i look at it in OPS, some of the faces have dissappeared! I guess I can just make all polys 1 sided, but I had been thinking that for some things (like 2nd level LODs), it would make sense to just have a flat sheet be the wing, etc.
What is the trick to getting this to work?thanks,
charm IP: Logged |
JT
Pilot
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posted 02-14- 03:03 PM
The way I do it is like this...1. Create one side of the piece.
2. Clone it (edit>clone>copy)
3. Select all the faces of the clone (sub-object>face)
4. Flip the normals of the selected faces.
5. Turn off sub-object and attach the cloned piece to the first piece. That's it. Don't weld the verts at this point. You don't want to weld the two sides together. IP: Logged |
Bryan Russell
Pilot
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posted 02-14- 05:22 PM
I don't know if this helps, but sometimes I manage to flip the normals of faces and then somehow apply a transformation that makes them look normal in MAX. When they get exported however they are flipped. To fix this I had to use the reset XForm,( or the $.transform = matrix3 1 thing )and then flip any faces that showed up as wrong.IP: Logged |
charmstar
Pilot
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posted 02-14- 05:26 PM
Thanks for the ideas, I'll try them out ASAP.charm IP: Logged |
Tailslide
Pilot
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posted 02-15- 10:57 AM
You can save yourself some poly's if you change your texture name to &metal_80 In Max before you export. This will give you a mirrored texture on both sides. Use JT's mirrored faces method if you want a different texture on both sides. TS ------------------
________________________
TS Aircombat
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JT
Pilot
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posted 02-15- 12:44 PM
TS,
I thought there was a problem with double sided polys in Openplane. Have you been able to get true double-sided polys to work?IP: Logged |
Tailslide
Pilot
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posted 02-16- 01:24 AM
Yes they work great. Doesn't work for glass though you need a face each direction for that. TS
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JT
Pilot
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posted 02-16- 02:11 PM
Ah-ha! That's the reason I was convinced it didn't work. The few times I had tried to make true two-sided polys, I was making glass.
Thanks, TS.IP: Logged |
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