[SOLVED] Mip mapping question

[demostenes]

How is it implemented? What is trigger for using higher mip? Distance of object, or size of object in pixels? 

[morbid]

Hello demostenes,

mips are switched depending on the distance to the object. The closer it is the more detailed mip you observe. 

[demostenes]

Ok, thanks. Can this be somehow controlled, or it is hardcoded in DX?

[morbid]

Hi,

I was wrong in the first place. Mips are switching automatically and this process is controlled by GPU. What mip level should be displayed depends on a number of calculations. as far as I see, the most important is delta X and delta Y for screen space. Please note, that mip selection also depends on screen resolution.

In Unigine there 2 possible ways to tweak this logic:

1. Enable Mip Bias in material states and change it in the Parameters tab
2. Modify directx shader

Both options will have a significant impact on performance. So, it's better to use automatic mip selection :)

Thanks!

[demostenes]

Great, thanks, this is exactly what I needed :)

Edited May 16, 2018 by demostenes

[morbid]

Glad to help!