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terrain volcanoe / thingy

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Hello all, I have been working on for the past week a terrain engine ... specifically a demo that has an island with mountain''s and a volcanoe on it, in a hawaii type place. I have been working on (for a little tonight (not much)) a particle engine to use as fire/lava coming from a volcanoe. The problem I''m having is that all the particles show through the mountains. I enable blending then draw the particles then i disable blending again. I have no idea why or how to fix this? If anyone could help me I would be very greatful and give you thanks when the demo''s done. Thanks, keep in mind this is kinda my first OpenGL demo thingy (thats actually getting done for more than 2 days) Thanks again. Oh yeah Here are some pics of the terrain && the problem im experiencing, and links to the pics. Any other ideas for creating lava/fire for the volcanoe I really would like to here.
links are http://www.geocities.com/tryforfulluse/terrain_particle.jpg http://www.geocities.com/tryforfulluse/terrainparticle2.jpg
... and so you guys know the entire demo has been coded by me tryforfulluse@msn.com ... Also any ideas for what I should do with this terrain thingy I would greatly appreciate.

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You should only turn off writing not reading from the depth buffer when you render the particles.

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