home *** CD-ROM | disk | FTP | other *** search
- This README file describes the working of the Direct
- 3D patch. This file updated last on May 20, 1997.
- Please note that this is an initial beta release of
- the 3D driver and does not support all 3D cards or all
- 3D features of the cards.
- MDK Direct3D notes.
-
- 1. Drivers.
-
- The proper functioning of Direct3D is entirely dependant
- on the user having the correct drivers on their machines.
- MDK uses several features of Direct3D which may not be in
- some of the older drivers supplied with cards. At the end
- of this document are the URL's for the places where we found
- the drivers we tested MDK with. Note that some of these
- drivers do not do everything that MDK needs them to do.
- If this is the case with the driver for your card, then
- contact the manufacturer directly and enquire about the
- availability of new drivers. A complete list of what MDK
- needs the driver to do and what is optional is available
- to card vendors to help in this respect.
-
- 2. The Direct3D options page and checking your driver.
-
- In the options menu there is a new entry, Direct3D.
- Selecting this allows you to configure how MDK uses Direct3D.
- The entries in the Direct3D options menu are:-
-
- Bilinear filtering (on/off/not available)
- Turns bilinear filtering on and off for smoother textures.
-
- Smooth shaded stream (on/off/not available)
- The stream section of the game has been improved graphically
- on cards which handle RGB gouraud shaded alpha blending.
-
- Masked Textures (Chroma key/texture alpha)
- Determines how MDK handles making parts of textures see through.
- This is mainly used in the explosion texture. If explosions
- have a black outline then this mode is probably set wrong. If
- explosions have a black outline even after changing this option
- then you need new drivers.
-
- Texture Error Detection (Direct3D / Direct3D + Shiny)
- Some drivers do not return errors when a texture fails to
- load properly, causing improper display of the scene. Because
- of this, MDK checks the free texture memory before and after a
- texture load, and if this is the same, it says the texture has
- failed to load. The Direct3D section must be selected on
- drivers which do not support returning the free texture memory.
- If your textures do not appear, and the game runs very slowly,
- then the "Direct3D" option should be selected. If the game runs
- fine, but some textures show garbage (one culprit = 2Mb Mystique)
- then the "Direct3D + Shiny" option should be selected.
- If a mixture of both is seen (white textures with Direct3D + Shiny
- and some garbage with Direct3D) then your drivers are very bad indeed,
- and should be replaced ASAP.
-
- Max. Texture size (64x64 128x128, 256x256)
- This limits the maximum size that a texture can be. On some 2Mb cards,
- it is very unwise to select the 256x256 option. On a 2Mb Mystique,
- the game will run correctly with the 256x256 option selected, but on
- other 2Mb cards, you may need to select the 128x128 option or even the
- 64x64 option. This option, as all the options, can be changed mid-game
- so if a particular room needs more texture space, just drop the max texture
- size down a bit.
-
- Test.
- This enables the Direct3D features test.
- The tests are, in order:-
- Flat color
- Textured
- Transparency
- Gouraud transparency
- Lines
- Gouraud lines
- Transparent lines
-
- Each test will show markedly different results from the last, so
- if you are unsure as to whether or not something changed, then the
- feature probably isn't working and you should try to get new drivers.
- The gouraud lines and transparent lines are a little different to the
- other tests in that they show a box of colour made up of horizontal
- lines. The Gouraud shaded box should be smoothly shaded from black
- to white, and the transparent lines should allow you to see the
- flat color test through it.
- During testing we had one crash problem with an older 3dfx driver when
- we tried to do the lines test, so if after a couple of seconds on the
- gouraud transparency screen, the test hangs, then your driver does not
- properly handle the line commands, and you should attempt to install a
- new version.
-
- Any options you change on the Direct3D options screen will be saved to
- disk on exit of the game.
-
-
- 3. Driver URLs:-
- Here are the URLs where you should be able to find the latest version
- of the drivers for your 3D card. You can look under either card
- manufacturer or chip manufacturer, but I recommend the card manufacturer
- to fully support all features of your card.
-
- All drivers (probably the best place to look):
- http://www.avault.com/hardware/biosdrv.asp
-
- 3dfx
- http://www.3dfx.com/game_dev/updates_bench.html
-
- ATI
- http://www.atitech.com/drivers/drivers.html
-
- Canopus
- http://www.canopuscorp.com
-
- Cirrus Logic
- http://www.cirrus.com/support
-
- Creative
- http://creative-ca.creaf.com/wwwnew/products/graphics/ps_graph.html
-
- Diamond
- http://www.diamondmm.com/product-support/drivers/driver-index.html
-
- Intergraph
- http://www.intergraph.com/ics/I3D100
-
- Rendition
- http://www.rendition.com/index2.html
-
- S3
- http://www.s3.com/bbs/0main/topindex.html
-
- Sierra
- http://www.sierra.com/hardware/screamin3d
-
-
- 4. FAQ
-
- Q. Why does music sounds choppy and garbled with the 3DFX card?
- A. On some 3DFX driver/sound card combinations the 3DFX driver
- is interfering with the sound. Adding the line:
- SST_SWAP_EN_WAIT_ON_VSYNC=0
- to the [3Dfx] section of your WIN.INI file is a workaround.
- Add the [3Dfx] section if you have to. This problem will likely
- be fixed in a newer release of the 3DFX Direct3D driver. Keep
- an eye out at www.3dfx.com. Make sure you have at least version
- 2.08 of the 3DFX driver.
-
- Q. Why doesn't the XXX feature work on my card?
- A. It probably does work on your card, its just that you have old
- drivers (or the card manufacturer has released unfinished drivers).
- Look at the URLs above to download new drivers, or contact the
- card manufacturer to complain if you have the latest drivers.
-
- Q. My textures just show white and my framerate is really slow. What
- is wrong?
- A. The Texture Error Detection selection in the Direct3D options menu
- is set to "Direct3D + Shiny" and your driver does not correctly
- report free texture memory. Try setting it to "Direct3D".
-
- Q. Why are of my textures corrupted?
- A. The Texture Error Detection is set to "Direct3D" and your driver is
- very naughty and returns no errors when a texture upload fails. Try
- changing the error detection mode to "Direct3D + Shiny" which tries to
- predict when a texture error has occured and fix it. If you already have
- this option selected or you get white textures with this option selected,
- then you need new drivers.
-
- Q. Why do some textures not appear and the framerate slow down at certain points
- in the game?
- A. You have your max texture size set too large for the memory present on your
- 3D card. Try lowering it. Although MDK tries to intelligently keep the
- latest textures on the video card, sometimes just too many textures are needed
- to complete a scene. This varies room to room and even viewpoint to viewpoint,
- so the texture size option can be altered mid-game safely to get around this.
-
- Q. Why do my explosions have a black outline?
- A. See the explanation of Masked Textures option, above.
-
- Q. Why does my sound go all screwy when there are polygons on screen?
- A. Some drivers hog the hardware cycles for transferring data, making the
- sound slow down/dropmout. The only known fix is to download new drivers.
-
- Q. Why do you keep telling me to download new drivers?
- A. When Microsoft wrote DirectX, they put a burden on the card manufacturers
- to write drivers for their cards to get the best performance from them.
- However, it seems that the DirectX standard for drivers was not very clear,
- and so card manufacturers were left guessing what to do for certain things.
- This has led to driver delays and incompatibilities (not good for a "standard"),
- and drivers missing key features, or reporting the presence of key features,
- but not implementing them...
-
- Q. Why isn't my framerate as fast as I think it should be?
- A. How fast do you want it to be?
- A2.Ask the card manufacturer when you ask about the latest drivers...
-