Hello,
Was wondering :
Does the complexity of a texture, like details in it, hit ingame performances ?
For example, is an alpha 1024 x 1024 texture with lots of halos inside it more gpu hungry than a single giant halo ?
Seems not, but I can’t understand that yet, as in a classical 2D engine it is very impacting.
And if it has some impact in 3D, by how much approximately ?
(from “a little” to “big”)
As far as I can tell, the shaders determine performance, not the textures themselves. The only exception to this is texture size, which can affect things a bit.
To illustrate this, the diffuse shader just uses the color information on each pixel of the texture when rendering it onto an object, as far as I can tell. You can put alpha in there, you can add transparencies in Photoshop, etc…, but it will still just render the pixels and ignore the extras.
If there is a performance difference, it’s way too small for me to measure.
Then there is no complexity limit, whatever hardware is it aimed for …
Awesome.
Thank you Gargerath 
Thats not fully true
If you use shaders that use alpha, the alpha presence actually will make a difference to it.
Ah 
Seems somehow logical to me, yep.
Actually, I just finished a test with 15 halo PNGs in my scene, and there’s no visible difference.
Maybe we could see one with hundred of it …