Flakes with WHITE flakes ?

[XavBo]

Hi guys, I decided to use for the very first time the car paint shader. In this case CarPaint2. I have never use the CarPaint material at all. Now in my normal shading day Im struggle to find out why vRay 5 is getting me white flakes at all. Using MaYa 2020 vRay 5 vRay SunLight and HDRI MaYa in cm Physical scale. It is a 8 meters object scene. Flakes Map Size @ 2048 (I dont think increasing the size the white dots they will be disappear) vRay Phisical Camera https://www.class-a-strak.com/XBO/CH..._FAQ___001.jpg

[XavBo]

I know I need to play with the Flake Size and the Flake Density, but still having many huge white spots. HM ! This is strange !

[Dimitrina.Milanova]

Hello,

Can you please attach a Maya scene, with which you are able to reproduce this problem?

Kind Regards,
Dimitrina Milanova

[XavBo]

Hi Dimitrina ! Sure I will upload the file tomorrow during the day. Thank you for your support !

[Dimitrina.Milanova]

Hello again,

I had further look into this problem it seems that the flakes that look like fireflies (white flakes) are actualy reflections from the light in the scene (in your case the VRaySun light), which is a expected result.

To be able to change the reflection of the flakes to a point that work best for you there are couple ways such as:
a) You can change the flake glossiness to a lower value.
b) You can change the flake orientation to a lower value.
c) If you do not want the flake layer of VRayCarPaint2Mtl, you can set the flakesize to zero (flakesize=0)

Can you please try the three workaround options from above and see if this will solve the problem?

Kiind Regards,
Dimitrina Milanova

[XavBo]

Hi Dimitrina ! Thank for your time and reply. I will have a look on this today late night or tomorrow then I will report you. One thing I will like to say is that Im fine with the spots that are appearing, but if those spots burn they the surrounded flakes they need to burn too. I already make some changes and it is working. The only Problem is that those spots that appear in the file now they dont appear. I will explain to you later

[XavBo]

Hi Dimitrina ! I didnt want to post anything yet, because you will maybe not be available to answer on the weekneds. I dindt try your settings, but I will do that. I was trying first to understand why the flakes doesnt work as they should. And the result of all the Test are below. Please have a look in the image below. I actually add a couple more of flakes shader with different settings an angles and the result is the same. What is wrong here ? The closer the light to the car the more intense should appear the flakes. Even if you put close the light to the flakes as you can see the flakes never appear. The light can be hot as you want, but the flakes will never appear. https://www.class-a-strak.com/XBO/CH...ROUP___001.jpg As you know the settings of my MaYa file are those from native MaYa file. - Y Up. - Centimeters. - Cars 4.5 Meters long. - Light Distances from the car are different and have different angles. - Light intensity and Shapes are different for the test. - Mostly the lights lighting in X direction are those that are showing the flakes. - The flakes are way to big. - Im using at the moment for the Test the Tri Planar Flakes Projection. - The Shader has 5 different Flakes with different settings. - At the moment only one Flakes Shader is a Bakmann and the other are GGX. All has different settings (Changes are mainly in the flake size, flake density and blur angle) - The distance from the camera to the car is 6 Meters - The render Camera as you know is a physical Camera.

[XavBo]

WHAT ?! Why in the Forum the EDIT button doesnt work anymore ? And why is all my text put together in one line ? The advance editor doesnt work too. I use Google Chrome.

[XavBo]

Hi Dimitrina ! I already found the way to make the desired effect properly work. I will post soon a couple of images. Thank you for your support !

[Dimitrina.Milanova]

Hello again,

The image you have attached above is not opening for me for some reason, so if you can attach new images with the desired effect you have mentioned that will be great.
In regards to the problem you are experiencing with the "Edit" button in the forum you can always contact out support team here: http://chaosgroup.com/help to have further look into the problem.

Kind Regards,
Dimitrina Milanova

[XavBo]

Hi Dimitrina, I made some renders back in 2016 already, but Im trying to develop / changing more my workflow. So this time I decided to use the flakes from vRay. The 3 days I spent without any result was really hard to understand how the flakes work. But now I found the way to work with the flakes. Note: The next images I save to post them after I got the flakes to work @ the 4th day So these images are only test in between. https://www.class-a-strak.com/XBO/CH...ROUP___001.jpg The on on the top left is a render of ONLY the flakes without the paint on top. The one on the top right is the one has all. And the pictures on the bottom are just angle tests.

[XavBo]

About the issue in the forum I already contact the chaos team. Kind Regards !