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Note: Windows builds require Visual C++ Redistributable Packages for Visual Studio 2013

• light: tweak phong shading to use area and angle weighting
• light: add "_phong_angle_concave" key
• light: fix -bspx option

Note: Windows builds require Visual C++ Redistributable Packages for Visual Studio 2013

• qbsp: fix hint/skip having corrupt texturing with -convert option
• qbsp: warn and heal invalid texture projections
• qbsp: fix -omitdetail to affect all types of detail
• light: warn and ignore invalid texture projections instead of aborting
• light: make more robust against degenerate tris

• light: add flood-filling to fix black seams in detailwall.map when no -extra/-extra4 used
• light: fix color->greyscale conversion to be compatible with MarkV and some QuakeWorld engines
• light: don't mark sample points inside semi-transparent shadow casters as occluded.
• qbsp: add "_external_map_scale" key for misc_external_map
• qbsp: experimental func_illusionary_visblocker entity
• qbsp: better detection of when a map exceeds BSP29 limits. Previously, a corrupt BSP would be written when nodes/leafs exceeded BSP29 limits.
• bsputil: add --convert option. Not very useful, but can convert between BSP2 and 2PSB, for example.
• bsputil: "--check" option logs world mins/maxs
• bsputil, bspinfo: can now read Q2 BSP files

• light: add "_sun" entity key to configure sunlight in an entity instead of worldspawn. More than one "_sun" entity is supported.
• light: add "_falloff" light entity key to configure light falloff in map units. Only supported on linear (delay 0) lights.
• light: add "_spotlightautofalloff".
• light: fix light cutoff on curved surfaces (https://github.com/ericwa/tyrutils-ericw/issues/172)
• light: adjust -soft to fix regression in 0.15.10 (https://github.com/ericwa/tyrutils-ericw/issues/171)
• qbsp: add "_mirrorinside" key for mirroring the outside faces of bmodels so they are visible from inside. for func_water, or func_illusionary fences, etc.
• qbsp: fix CSG issue with overlapping off grid brushes (https://github.com/ericwa/tyrutils-ericw/issues/174)
• qbsp: fix HOMs introduced in 0.15.10, which were caused by an attempt to fix leaks-through-solids in 0.15.10. To re-enable the buggy code that may fix leaks through solids but add HOMs, use "-contenthack" (https://github.com/ericwa/tyrutils-ericw/issues/175).

• light: add _shadowworldonly bmodel key - only cast shadows on world, not other bmodels.
• light: switchable bmodel shadows (requires QuakeC support, see light manual).
• light: accept _minlight in worldspawn as an alias for "light"
• light: handle degenerate faces, print out the vertex coordinates
• qbsp: misc_external_map prefab system (see qbsp manual)
• qbsp: don't write unused texinfo
• qbsp: rewrite outside filling similar to q3map
• qbsp: revert change to SubdivideFace which was increasing faces a bit (see 53743dd)
• qbsp: add -expand option to dump the hull expansion to a "expanded.map", from q3map
• qbsp: add -leaktest option to abort compilation when a leak is found, from qbsp3
• qbsp: fix handling of duplicate planes, which was causing id1 maps to leak
• qbsp: try to get more reliable leaf content assignment (see a910dd8)
• bsputil: --check: print BSP tree heights at the first few levels of the tree
• bsputil: --check: check for unreferenced texinfo, vertices, planes
• bsputil: --check: print number of used lightstyles
• misc: travis-ci now runs qbsp on all id1 maps, the build fails if any maps leak

• light: styled lights no longer bounce by default, set "_bouncestyled" "1" to enable.
• qbsp: map format conversion: fix reversing of epairs in converted maps
• qbsp: func_detail rewrite to fix vis issues with previous version. NOTE: func_detail no longer seals maps.
• qbsp: add -omitdetail to omit all func_detail entities from the compile
• qbsp: new func_detail_illusionary entity. func_detail variant with no collision (players / monsters / gunfire) and doesn't split world faces. Doesn't cast shadows unless enabled with "_shadow" "1". Useful for hanging vines. Still creates BSP leafs. (Possible enhancement: avoid creating new leafs and just insert marksurfaces into existing leafs?)
• qbsp: new func_detail_wall entity. func_detail variant that doesn't split world faces. Useful for when you want a decoration touching a floor or wall to not split the floor/wall faces (you'll get some overdraw instead.) If it completely covers up a world face, that face will get clipped away, so it's not suitable for fence textures; see func_detail_fence instead.
• qbsp: new func_detail_fence entity. Similar to func_detail_wall except it's suitable for fence textures, never clips away world faces. Useful for fences, grates, etc., that are solid and block gunfire.
• qbsp: add -forceprt1 option to generate a .prt file that GTKRadiant's prtview plugin can load (but will be unusable by vis). When func_detail is in use you normally get a PRT2 file that ptrview can't load.
• qbsp, light: allow "_shadow" "-1" to stop a func_detail from casting shadows

• light: fix Linux binary
• light: lights with a lightstyle now bounce
• light: new sample point positioning code
• light: per-light "_bouncescale" key
• qbsp: origin brush support
• qbsp: add -omitdetail option, strips out all func_detail brushes
• qbsp: add -convert option for converting between .MAP formats

• light: fix black fringes on bmodels that are touching against the world
• light: light passing through glass lights up the back side
• light: bmodels with "_alpha" < 1 and "_shadow" "1" set cast tinted shadows
• qbsp: support Quake 3 "Brush Primitives" .MAP format
• qbsp: save "_mincolor" for func_detail/group to the .texinfo file, now used by light
• qbsp: performance improvements

• light: fix black noise in some cases when using -bounce. (reported by Pritchard)
• light: try to limit artifacts caused by "too many lightstyles on a face", by saving the 4 brightest lightmaps. The previous behaviour was random, so you would likely get bad artifacts when that warning occurred.
• light: restore and expand the "unmatched target" warnings. Now checks "target", "killtarget", "target2", "angrytarget", "deathtarget". Also checks for any "targetname" that is never targetted.
• light: restore support for skip-textured bmodels with "_shadow" "1". This is only supported on bmodels where all faces are textured with "skip".
• light: add "_lightignore" model key, makes a model receive minlight only.
• qbsp: accept absolute path to map (reported by lurq)

Bugfixes:

• light: fix shadow-casting bmodels that touch the world from messing up sample points on world faces, and prevent the world from messing up bmodel sample points (regression in 0.15.5)
• light: clamp lightmap samples to 255 before smoothing, downscaling. reduces jaggies in cases with very bright lights casting hard shadows.
• light: fix order of "_project_mangle" value to be consistent with "mangle"
• light: various crash fixes
• light: minlight no longer bounces

Performance:

• light: new, faster raytracing backend (Embree)
• light: estimate visible bounding box each light by shooting rays in a sphere. this gives a speedup similar to vised maps in 0.15.5, without requiring the map to be vised. As a downside, there is a small chance of introducing artifacts where lights cut off too soon. Disable with "-novisapprox".
• light: bounce lighting code redesigned to use less memory

Other:

• all: windows builds now require MSVC 2013 runtime: https://www.microsoft.com/en-ca/download/details.aspx?id=40784
• all: restore Windows XP support