轉(zhuǎn)換為MTL格式的文件，這可以被Sandbox的材質(zhì)編輯器編輯。
1. 打開3ds max的材質(zhì)編輯器（material editor）
2. 選擇一個(gè)新的材質(zhì)球，點(diǎn)擊標(biāo)準(zhǔn)（Standard）按鈕，材質(zhì)類型為多維/子對象（Multi/Sub-Object）
screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new windownCTRL+Mouse wheel to zoom in/out';}" onmousewheel="return imgzoom(this);" onclick="if(!this.resized) {return true;} else {window.open(this.src);}" border="0" hspace="0" alt="Click here to open new windowCTRL+Mouse wheel to zoom in/out" src="http://img3.gamersky.com/upload-hd/200711/20071105154625550.png" width="450" height="466" resized="true" ke-onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new windownCTRL+Mouse wheel to zoom in/out';}" />

3. 設(shè)置子材質(zhì)數(shù)量為3個(gè)，引擎支持最大32個(gè)子材質(zhì)，當(dāng)然用的越多，效率越低。所以要盡可能減少多余子材質(zhì)的使用

4. 給材質(zhì)和子材質(zhì)命名，材質(zhì)的名稱就是材質(zhì)文件的名稱。這里材質(zhì)名為Testbox，材質(zhì)文件名就是Testbox.mtl
screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new windownCTRL+Mouse wheel to zoom in/out';}" onmousewheel="return imgzoom(this);" onclick="if(!this.resized) {return true;} else {window.open(this.src);}" border="0" alt="" src="http://img3.gamersky.com/upload-hd/200711/20071105154628687.png" ke-onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new windownCTRL+Mouse wheel to zoom in/out';}" />

5. 打開各個(gè)子材質(zhì)，更改著色器類型為Crytek Shader，你只能使用這個(gè)類型。