Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: ysrimtz on 2024-05-14, 16:00:02

Title: Corona Pattern showing a weird grid kind of pattern
Post by: ysrimtz on 2024-05-14, 16:00:02

Hi,

Having issues with corona pattern mod.
please have a look at what i am trying to achieve.
(https://i.postimg.cc/VNnz3fWf/Screenshot-2024-05-14-182410.png) (https://postimages.org/)

and this is what i get when i rendered it...
(https://i.postimg.cc/nzTrPVns/Screenshot-2024-05-14-184914.png) (https://postimages.org/)


here you will notice those strange grid type patterns occurring in the chains more prominently.(https://i.postimg.cc/pLjPhf1V/Screenshot-2024-05-14-191813.png) (https://postimg.cc/v4GJCVsC)

The chain design is similar but idk why is that grid appearing.

This is the actual chain design. (https://i.postimg.cc/bJMHsfBB/Screenshot-2024-05-14-182543.png) (https://postimages.org/)

This is what i modeled and applied on my surfaces. (https://i.postimg.cc/mg2zf6dz/Screenshot-2024-05-14-183141.png) (https://postimages.org/)

Kindly if someone could guide me through this. Thankx

Title: Re: Corona Pattern showing a weird grid kind of pattern
Post by: TomG on 2024-05-14, 19:25:14

Looks like some moire effect, since it only shows up where you can see another patterned surface behind the first. You can try hiding every layer except one, see if the grid effect disappears on the remaining layer. If so, then it's simply the visibility of one layer behind the other - in the real world example, the chains are not all in perfect alignment, so this doesn't occur, but in the case of Pattern they are all perfectly aligned and repeating, so that there is a pattern made from seeing one pattern behind another.

You could try adding some displacement to the base geometry, sort of like ripples in the way they hang, which will then randomize things a little, and / or you could try moving things around inside the geometry to be patterned so that it isn't 100% regular.

Title: Re: Corona Pattern showing a weird grid kind of pattern
Post by: maru on 2024-05-15, 14:59:05

Is your crop box placed in a way that results in perfectly tileable pattern? Also, are you sure that the UVW mapping is correct on the base geometry?

Title: Re: Corona Pattern showing a weird grid kind of pattern
Post by: arqrenderz on 2024-05-15, 15:28:44

Nothing is really perfect in reality, thats corona pattern achiles heel.
You need some random rotation and position to break that pattern