2009年10月10日

1.spacing:有點類似Fluid的Rez,應該是resulution單位的大小,愈小密度愈高,也愈真實。
2.Quality:(max:10)運算品質。
3.Advection Stride:(max:1.0) 對流的程度,對流愈強消散愈快,個人認為這沒啥用。
4.Time Scale:(max:10)模擬時間的級數,可以把它當作速度和時間的乘項。
5.Gravity:重力,沒啥用基本上不會動到。
6.Buoyancy:浮力,真的要控制流體就是要靠這個。
7.Vorticity:(max:1.0)這個參數自帶有不錯的細節,所以如果其他設定很精細,這個參數就要調低,以免細節過於繁複拖慢速度。
8.Velocity Damping:(max:1.0)速度的遲緩度,基本上我建議這只適合用在有煙的模擬,大小不要超過0.1。
9.Burn Rate:(max:100)看下圖就了解了。
10.Heat Production:這決定了燃燒每個百分比的Fuel的溫度上升率。
11.Expansion:這決定了燃燒每個百分比的Fuel的壓力增加率。簡單來說就是爆炸效果啦!
12.Dissipation Strength:(max:100)這是決定流體尾巴的長短,流體的損耗度。
13.Fuel Amount\Temperature Amount\Smoke Amount:這三個是關於每個立體像素所對應的量,max:100\9999\9999

參數設定影片下載

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原文參考
Written by Mihai Panait
Thursday, 19 June 2008 20:26

The FumeFX UI Floater Window is your main command center for creating and controlling effects with FumeFX plug-in. It is a modeless, floating dialog box that contains a wide range of controls, which are logically organized into a toolbar and five tabbed panels. To access this window: select a FumeFX object in your scene; click on the 3ds Max Modify icon; and then, select the FumeFX UI button to toggle it open.

I've done some tests on the most important properties to see how each affect the look of the fire. This tests are intended to save you some render time by reducing the number of tries, if you have a clear image in your mind about how your fire should look like. You can download the animated version from the link at end of this article.

Spacing Values

Spacing (General Parameters Rollout) - This parameter directly affects the detail level in your simulation. Type in or use the spinner to set the spacing of the voxel-based grid. The chosen value defines voxel size; smaller voxel size allows for more voxels in simulation, which produces greater detail.

Simulation Quality

Quality (Simulation Rollout) - This defines simulation realism. Higher quality increases realism, but means more computation and slower simulation performance. This is sometimes necessary; for example, it is advisable to increase quality for fast moving objects. Another way to look at Quality is that this number represents how many times the the Maximum Iterations will be used to determine the simulation.

Advection Stride

Advection Stride (Simulation Rollout) - The lower this stride is, the less dissipation of velocity and smoke will happen. It is a more or less inverse proportion to simulation time.

Time Scale

Time Scale (Simulation Rollout) - Use this to speed up or slow down the passage of time during simulation. If you set it to 0, the simulation comes to a halt; set a higher value to increase speed. If you accelerate time by some significant amount (>1.5x), you will have to increase the simulation steps as well to preserve stability and continuity. Also, note that you can animate this parameter.

Gravity

Gravity (Simulation Rollout) - This value defines gravity strength. Note that this affects smoke, based on the smoke’s density value.

Buoyancy

Buoyancy (Simulation Rollout) - This value defines how much the fluids will rise in correspondence with the temperature.

Vorticity

Vorticity (Simulation Rollout) - This parameter is very useful for coarse grids, where simulations lack detail. When you increase grid detail then the need for vorticity is lowered, since the simulation itself will result in more detail. Higher vorticity will increase the number and strength of small vortices in the fluid.

Velocity Damping

Velocity Damping (Simulation Rollout) - This gradually slows down the speed of flow, simulating internal friction.

Burn Rate

Burn Rate (Fuel Rollout) - The percentage of fuel in each voxel that is burned with each frame. Heat production and Expansion depend on the amount of burned fuel.

Heat Production

Heat production (Fuel Rollout) - This determines the rate of temperature increase per burned fuel. With high heat production, temperature in the grid will increase, causing fluid to rise faster (due to the buoyancy parameter).

Expansion

Expansion (Fuel Rollout) - This determines the rate of pressure increase per burned fuel. Excessive expansion can create extreme velocities and cause simulation times to increase significantly.

Smoke Dissipation Strenght

Dissipation Strength (Smoke Rollout) - The higher this value, the more rapidly smoke will diminish. This parameter is expressed as percentage of voxel value that will be lost.

Fuel Amount

Fuel Amount (Object Source Parameters Rollout) - This is the fuel amount that is set or added to each voxel.

Temperature Amount

Temperature Amount (Object Source Parameters Rollout) - This is the temperature amount that is set or added to each voxel.

Smoke Amount

Smoke Amount (Object Source Parameters Rollout) - This is the smoke amount that is set or added to each voxel.

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