It is currently 21 October 2014, 14:29




Post new topic Reply to topic  [ 5 posts ] 
 VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG] 
Author Message
Site Admin
User avatar

Joined: 10 January 2008, 17:31
Posts: 415
Location: Bergamo - Italy
Post VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG]
Vray 1.5 SP3 - Clouds tutorial

by Francesco Legrenzi @ copyright 2009
www.francescolegrenzi.com




INTRODUCTION

VRay 1.5 SP3

VRay 1.5 SP3 has been released today. Having many new tools, VRayEnvironmentFog maybe considered the most interesting. it should look like a simple fog system, similar to max's one, but it's really more powerful, in fact it can interact with Global Illumination and generate volume caustic effects.


Image
Fig. 01 - Example of VRayEnvironmentFog used for creating fog and haze effect. Image by http://www.rendering.ru


it can generate both lights and volume caustic effects.

Image
Fig. 02 - Lights and volume caustic effects.


Adding a light fog, VRayEnvironmentFog (VEF) can be used in interiors to give a mysterious charm.

Image
Fig. 03 - Example of interior fog.

Maybe the unexpected implementation allows clouds creating.

Image

Image
Fig. 04 - 05 - Two examples of clouds using VEF.

_________________
VRay 1.5 - LA GUIDA COMPLETA


17 March 2009, 11:45
Profile
Site Admin
User avatar

Joined: 10 January 2008, 17:31
Posts: 415
Location: Bergamo - Italy
Post Re: VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG]
TUTORIAL

Our first step is creating an atmospheric gizmo containing volume effect. now create a VRayPhysicalCamera, a VRaySun+Sky system and set LWF (Linear Work Flow), in a metric scale scene. last step make easier handling large scenes.

Image
Fig. 06 - Creating gizmo for VEF.


We can create gizmo in Create-> Helpers-> Atmospherics -> Box Gizmo and setting volume for a cloud layer: 6000x6000x300 meters. Next step: VRayPhysicalCamera.

Image
Fig. 07 - All default params used, eccept reducted focal lenght, to achieve a grandangular emphasizing sky effect. Put in scene as showed to increase perspective look.


Creating light system is quite easy. go to Create -> Lights -> VRay -> VRaySun, dropping light in scene. check yes to popup question to get automatically VRaySky map in 3dsmax Environment.

Image
Fig. 08 - Use default VRaySun params. Take a look at VRaySky map included in Environment map slot, and further selection in VEF.


Now in 3ds max "Environment and effects" module (press "8") we add VEF effect. Following default params:

Image
Fig. 09 - The VEF.

1st rollout, General parameters, manages main effect params.
2nd modulates some features with maps. We're getting clouds adding map to density slot. 3th rollout links VEF to related gizmo, that can be shaded by user-defined lights. Step one: link VEF to gizmo.

Image
Fig. 10 - Click Add to select gizmo from scene..


Resulting render. not our best!

Image
Fig. 11 - Not our best.


Enlarge view

Image
Fig. 12 - The gizmo is full of fog.

We see gizmo is "full" of dark and dense fog, so light cannot penetrate it.
Adding texture to density channel we can modulate density areas. Use Noise map with following params:

Image
Fig. 13 - Noise params used for clouds


Following final render params:

Image
Fig. 14 - Params for VEFappearance and quality. Thanks to three slots, we meet great flexibility.


More than other params, step size holds render times. Increasing his value, render times decrease, trading off render quality. Follows final render:

Image
Fig. 14 - Final render.

_________________
VRay 1.5 - LA GUIDA COMPLETA


17 March 2009, 11:54
Profile
Site Admin
User avatar

Joined: 10 January 2008, 17:31
Posts: 415
Location: Bergamo - Italy
Post Re: VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG]
CONCLUSION

With a small VRayEnvironmentFog tutorial we introduce an easy and quick way to create a cloud system, able to interact and dynamically react to existing lighting, giving user a powerful tool to create complex and realistic environments.
Changing procedural map params and sun or camera position we can also create animations.
Following some beta testing short videos.

Thanks for watching :)

Francesco Legrenzi (cecofuli)
www.francescolegrenzi.com


Attachments:
Clouds_mov_sample.rar [870.92 KiB]
Downloaded 816 times

_________________
VRay 1.5 - LA GUIDA COMPLETA
17 March 2009, 12:03
Profile
Site Admin
User avatar

Joined: 10 January 2008, 17:31
Posts: 415
Location: Bergamo - Italy
Post Re: VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG]







_________________
VRay 1.5 - LA GUIDA COMPLETA


17 March 2009, 12:03
Profile

Joined: 9 August 2010, 21:32
Posts: 1
Post Re: VRay 1.5 SP3 - VRayEnvironmentFog Tutorial - Clouds [ENG]
I have a problem, In the final result my clouds are gray........HELP!!!!!!!!!!!!!!!!!!!


9 August 2010, 21:35
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore.