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fix distant z-fighitng in reflective flats

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Z-fighting between flat texture and stencil at long distances was occurring, showing up as a "shimmer" at a long distance from the camera. Just increasing the vertical shift of flat texture.

Addressing this bug: https://github.com/ZDoom/gzdoom/issues/3246
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dileepvr 2025-08-03 17:55:56 -06:00 • committed by Ricardo Luís Vaz Silva
commit 798308a511
1 changed files with 1 additions and 1 deletions
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2
src/rendering/hwrenderer/scene/hw_flats.cpp
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@ -323,7 +323,7 @@ void HWFlat::DrawFlat(HWDrawInfo *di, FRenderState &state, bool translucent)
int rel = getExtraLight();
state.SetNormal(plane.plane.Normal().X, plane.plane.Normal().Z, plane.plane.Normal().Y);
double zshift = (plane.plane.Normal().Z > 0.0 ? 0.01f : -0.01f); // The HWPlaneMirrorPortal::DrawPortalStencil() z-fights with flats
double zshift = (plane.plane.Normal().Z > 0.0 ? 0.1f : -0.1f); // The HWPlaneMirrorPortal::DrawPortalStencil() z-fights with flats
SetColor(state, di->Level, di->lightmode, lightlevel, rel, di->isFullbrightScene(), Colormap, alpha);
SetFog(state, di->Level, di->lightmode, lightlevel, rel, di->isFullbrightScene(), &Colormap, false);