re: stencil planes

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Lance R. Marrou (marrou++at++vsl.ist.ucf.edu)
Thu, 23 Mar 1995 11:16:28 -0500 (EST)

Back to the problem Bentio Graniela posted. It works fine on an RE, of course,
but on an Extreme it doesn't. The layers are configured with
PF_BASE_HIGH_QUALITY, which will use the stencil plane. This is through the
LoadFltMode(PFFLT_LAYER_MODE,1) call. However, the roads (layers) still show
through closer terrain. Both home brewed software and perfly (via the -O 9)
do this. Could the problem lie in the size of the stencil plane (4 bits) or
the size of the z-buffer (23 bits)? Or could it lie in the fact (I think fact)
that Performer only requests the lowest order bit of the stencil plane?

Just fyi, the roads are about 50-100 meters away and the obstructing hill is
about 5-10. (or units, whatever...)

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