Do you know which format material maps are used?
Map format ???
I don't seem to have paid much attention to eh!!!
Should it be TGA, PNG?
Ha? I don't seem to have learned anything yet!
Confused today!!
Believe what I said
Definitely part of the little baby
I've heard of it but don't know much about it
Then in this issue, the answer will be solved
Let's take a look at it first
The difference between PNG and TGA image formats in the traditional sense
PNG: Streaming network graphics format
Can be used to store grayscale images and color graphics
TGA: Image file format
Files are 24-bit or 32-bit true color
While taking into account the image quality of BMP
It also takes into account the volume advantages of JPEG
Both PNG and TGA are available.
1. Transparent background
2. High compression ratio
3. Good image quality
These three points are actually decided
Both have a good performance in the CG field
So who is better?
More intuitively
PNG and TGA two mapping formats
The core difference is this
The TGA format has an Alpha channel
So what is the Alpha channel
And what kind of role can it play?
The most important use of alpha channels in PS
Store and build selection ranges
To put it simply
Alpha is an 8-bit grayscale channel
Three types of transparency information for an image are recorded with 256 levels of grayscale
1. Transparent area (black non-selected area)
2. Opaque areas (white full selection area)
3. Translucent area (gray semi-selected area)
PNG, on the other hand, is lossless compression using the lz77 algorithm
Its advantage is that the size becomes smaller after compression without losing accuracy
But the game runs these texture formats
Use PNG compared to TGA
It takes one more decoding process
It will bring a greater burden to the operation work
That's why
TGA picture with Alpha channel
Colors can be stored separately from transparent channels
and make edits and much more
These also determine the TGA in the field of CG
There is a wider use than PNG
But this also does not represent PNG
Will not be used in CG projects
Simple for some graphics
Don't care about a small number of items in the size of the game
It is also a texture that will be used in PNG format
Well, after reading this issue
About PNG and TGA image formats
Can there be a deeper understanding?
If it helps you
Please light up the triplet at the end of the article
Well, we'll see you next time!