What do make 3d background in T3d *.mis?

#1 In T3D, you have two options for the sky... 1) Make a skybox, 2) Use Skatter Sky (dynamicly generated sky)

If you need something else, you'll need to write some custom code.

#2 Are you talking about actual 3D terrain? If so you can use the built in terrain tools in the editor. Additionally I can recommend L3DT by bundysoft for terrains. I personally use both of those together.

#3 If I understand this correctly, you want to add a background scene like a skybox, but made of custom geometry, like a distant cityscape or mountains. Kind of like what HL2 & other Source Engine games do for backgrounds?

If that's about right, I'd consider that what you might want is a skybox that isn't actually a box. Basically, you would use the skybox-style rendering (always render first, making it appear to be behind everything in the actual scene) with whatever geometry you wanted. You'd want this object to ignore dynamic lights in the scene, because it's technically a very small object that follows the camera around, but might still want it to take lighting from the sun in the scene (unless you intend to bake lighting into its textures).

#4 Yes, I want to join like the Engine HL2 or UE3 scene background. It may be a ring model.

#5 hope TP(GG) can add this code to T3d next...

#6 In theory, it shouldn't be too difficult... Henry Toss already outlined the steps required. you'll want to basically combine SkyBox code with the RenderShape example.

#7 OK.thanks every body...I try...