OcclusionQueryNode works by performing occlusion tests against the contents of the depth buffer. If your ceiling is being face culled and therefore not writing into the depth buffer, then it shouldn't occlude the furniture, and OcclusionQueryNode should render them. If this isn't happening, something else must be wrong. Can you post a .osg file that reproduces the problem in osgviewer? -Paul
_____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of wangzhuhhjj Sent: Thursday, April 17, 2008 10:09 PM To: osg-users Subject: [osg-users] [Help]occlusion quey node does not work when theoccluder node is set cullface hi,guys I'm using occlusion query node of osg2.3.7 and it's wonderful. But I met a problem that I put the ceiling and floor of a room in root and the furnitures in room in occlusion query node. Then I set ceiling's face osg::CullFace::FRONT and floor as osg::CullFace::BACK, so that when I see from top of the floor, I can see the things in the room because the ceiling is culled, however when I see from in the room, I can also see the ceiling. Then the problem comes, when I use occlusion query node, I found that when I see from top of the room and the ceiling is culled, the furnitures in the room also don't render, I think the problem is that although the ceiling is culled, it can still occlude the furnitures. Because the floor and the ceiling is in the same node (different drawables) and can not placed in different group, so are there any methods to solve this kind of problem ? thanks a lot! shubo
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