Bugs in ThreeDWorld:

- Squashed objects have problems because vectors are improperly transformed (G3dVector.TransformVecDiffs?)
 
- Make HiresFrame doesn't work

- Put threeddemo into /Cedarchest/Graphics3d.df

- Hidden lines and normaled lines don't work

- works okay with non-summed tables and antialiasing
- what about summed tables with non-expanded surfaces?

- progressReportsPerFrame doesn't work when using offScreenCtx

- check use of shadingProps for consistency (should they persist across shadingClass changes)

- Put keywords for texture types in MappedAndSolidTexture.mesa or somewhere better

- Anti-aliased hidden line drawings

- Anti-aliased text always overwrites (extensions to ImagerSmooth required)

- Weird little spots when making expanded tetrahedron with one black face

- backfacing polygons not shown in transparent closed surfaces

- Clipping and transparency interaction with nonplanar polygons

- MakeTxtrCoordsFromNormals bug

- Off-pixel vertices for ScanconvertImpl (to fix missing pixels between patches)

- Log file needs to be removed when window is destroyed and window removed when log closed

- Fancy tiler doesn't add spots up quite right - off by more than one?

- FileStream.StreamFromOpenStream allows process communication, should be useful