ice-boy opened this issue on Apr 10, 2007 ยท 48 posts
bagginsbill posted Thu, 12 April 2007 at 8:57 AM
Your English is fine - don't worry about that!
What I meant about material zones is that you can assign new materials to polygons on a prop using the Group Tool, selecting individual polygons and assigning a new material to it.
The long cape is one-sided and does work with this shader. Here I have made the outside blue and the inside tan.
It appears that you can't tell the difference between one and two-sided props in the preview. Even two-sided polygons disappear when you rotate them so that they are facing away from the camera.
I don't actually understand how two-sided polygons are represented in the geometry, so I can't tell you what to look for. I just know that the Poser one-sided square comes out red on one side, and green on the other, whereas the hi-res square comes out red everywhere.
Artpearl:
The gray Jessi dress works as well. It is one-sided, and I applied the red-green scheme to it as you can see. I exported it as an OBJ file and reimported it so it was no longer a conforming figure. Then I added a Wind Force object and did a cloth simulation to get the front of the dress to flip up.
When you say the back was green, that is correct. Remember, this trick is not paying attention to the camera. It is simply using the rule that any polygon facing North is green, South is red. If you move the camera, then you will be looking at green polygons. You can't move the camera. You must rotate your props or figures instead. The camera must be looking straight north, toward the negative Z axis, or it will "see" the front of polygons that are supposed to be facing the other way for the trick to work.
To both of you, I see problems with this technique besides the camera issue. The cloth simulation sometimes makes folds that pass through each other. When this happens, a you sometimes can see a North-facing polygon that should be hidden by a South-facing polygon, and you get the green where you should get red. This shows on part of the dress. I don't know what to do about that.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)