xiaome Posted January 16, 2014 Share Posted January 16, 2014 Hi everyone, Is the first time I post in this forum and hope to have fun in this community. I'm a beginner in Vray and I have an issue with my a render that I would like to ask you about. It looks too foggy and I don't know what is the problem. I use Vray 2.4004, 3dsmax 2014 and Solid Rocks. The lights in the scene are: Vray Sun and a Vray Dome light with a HDRI. Vray planes on the ceiling of the room and the 2 windows. Thanks for your help! Link to comment Share on other sites More sharing options...
Ismael Posted January 16, 2014 Share Posted January 16, 2014 Looks like you have managed to grind the Solid Rocks into sand! Link to comment Share on other sites More sharing options...
xiaome Posted January 16, 2014 Author Share Posted January 16, 2014 Thanks Ismael for your post. I reseted Solid Rocks and the problem persists... Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted January 16, 2014 Share Posted January 16, 2014 Is fog enabled in the environment rollout? Press 8 and see. Link to comment Share on other sites More sharing options...
xiaome Posted January 16, 2014 Author Share Posted January 16, 2014 Thanks Corey for your post. Fog is not enabled in the environment rollout. Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted January 16, 2014 Share Posted January 16, 2014 If fog is not enabled then it is most likely a gamma issue. How are you viewing the file? are you saving it first? what are your gamma settings? what are your gamma settings in the Color Mapping rollout of the Render Dialogue? Also, since you are a beginner, get this habit started early. For the love of god, straighten your camera. It is the Vertical Shift section of the camera settings and you can just hit "Guess Vert." Link to comment Share on other sites More sharing options...
xiaome Posted January 16, 2014 Author Share Posted January 16, 2014 If fog is not enabled then it is most likely a gamma issue. How are you viewing the file? are you saving it first? what are your gamma settings? what are your gamma settings in the Color Mapping rollout of the Render Dialogue? Also, since you are a beginner, get this habit started early. For the love of god, straighten your camera. It is the Vertical Shift section of the camera settings and you can just hit "Guess Vert." I'm viewing the file through Vray FB and it looks the same when I render it and when I save it. I do have SRGB disabled. Once I render I save the file. Gamma/LUT settings and color mapping rollout in the attached file Thanks for the comment on the camera! And thanks for replying!! Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted January 16, 2014 Share Posted January 16, 2014 Sounds like it is all on the up and up though I would suggest you keep sRGB enable. It also looks like your burn value is in the "Exponential" direction of Reinhard. Set this at .5 for a true balance or just switch to a linear method for the moment. With reinhard the tendency is to go down in value, not up. I would also tick on your AA filter for a final. Off is good for testing. My next guess would be the lights. Turn them all of and then render tests one by one to see which one is the culprit. The general approach is to check Geometry, Material, and Settings. There is no set order, but Geometry is checked by turning layers of, materials by an override material followed by turning layers off, and settings, by fighting the urge to kill yourself while you check every possible avenue one item at a time. Good luck! I think it's a setting issue and you are going to be chasing your tail for a while. Link to comment Share on other sites More sharing options...
xiaome Posted January 16, 2014 Author Share Posted January 16, 2014 Thanks! I will keep trying! Link to comment Share on other sites More sharing options...
Nic H Posted January 16, 2014 Share Posted January 16, 2014 solid rocks is preventing you from learning the fundamentals of vray Link to comment Share on other sites More sharing options...
RyderSK Posted January 16, 2014 Share Posted January 16, 2014 Sounds like it is all on the up and up though I would suggest you keep sRGB enable. No. Since he is using baked gamma approach, the correct thing is the keep sRGB ("gamma preview") off. Ticking it on now would preview "double" gamma. It also looks like your burn value is in the "Exponential" direction of Reinhard. Set this at .5 for a true balance or just switch to a linear method for the moment. With reinhard the tendency is to go down in value, not up.[/b]. Oppositely. 1.0 Reinhard is [almost] fully linear, 0.0 is exponential. AA filter is completely optional as well, although in clamped [1.0] image it does provide benefits. It's not affecting AA quality though. Anyway, this has nothing to do technical settings whatsover, from your describtion and seeing how the "shadows" behave, the solution is pretty clear. You setup completely wrong light, in physical terms, I don't even want to see how those "vray planes on ceiling" look like. Start over, and start simple. With single light in windows, or simple default VraySun&Sky. If you don't know how to use the rest, don't yet. Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted January 16, 2014 Share Posted January 16, 2014 Thanks for the corrections Juraj.... It was very late when I was looking at this. Link to comment Share on other sites More sharing options...
RyderSK Posted January 16, 2014 Share Posted January 16, 2014 Thanks for the corrections Juraj.... It was very late when I was looking at this. Heh, one thing I strongly agree, is the vertical correction, but foremsot, vertical camera to start with :- ) I don't understand how people arrive at these random angles... Link to comment Share on other sites More sharing options...
markparsons Posted January 16, 2014 Share Posted January 16, 2014 Juraj just dropped a Hiroshima-sized payload of knowledge. Link to comment Share on other sites More sharing options...
Corey Beaulieu Posted January 16, 2014 Share Posted January 16, 2014 Juraj just dropped a Hiroshima-sized payload of knowledge. Really? Couldn't have just said "a lot of information?" You had to go with Hiroshima? Link to comment Share on other sites More sharing options...
Scott Schroeder Posted January 16, 2014 Share Posted January 16, 2014 SRGB=ON SRGB=OFF Don't forget to make sure you know what your mode setting does to your image as well. This is often overlooked when trying to determine gamma issues combined with the SRGB button being on or off. I may have been dreaming when I recall this, but I think Reinhard prefers having Gamma only. If it's off or gamma and color, then it negates your Reinhard settings. Though this may or may not have been back in the day where it was the "Don't Affect Colors" button. Of course, I could be making that all up from some fake memory. Link to comment Share on other sites More sharing options...
xiaome Posted January 20, 2014 Author Share Posted January 20, 2014 solid rocks is preventing you from learning the fundamentals of vray Interesting thought. Actually, I tried to render without Solid Rocks, and there is a noticeable difference in the result! Thanks for your comment! Link to comment Share on other sites More sharing options...
xiaome Posted January 20, 2014 Author Share Posted January 20, 2014 No. Since he is using baked gamma approach, the correct thing is the keep sRGB ("gamma preview") off. Ticking it on now would preview "double" gamma. Oppositely. 1.0 Reinhard is [almost] fully linear, 0.0 is exponential. AA filter is completely optional as well, although in clamped [1.0] image it does provide benefits. It's not affecting AA quality though. Anyway, this has nothing to do technical settings whatsover, from your describtion and seeing how the "shadows" behave, the solution is pretty clear. You setup completely wrong light, in physical terms, I don't even want to see how those "vray planes on ceiling" look like. Start over, and start simple. With single light in windows, or simple default VraySun&Sky. If you don't know how to use the rest, don't yet. Thanks Juraj, Actually, I tried it from scratch as you mentioned without the light planes in the top and adjusted the camera exposure/vray sky/Vray Sun. It looked a little bit dark so I added an ambient light only affecting the GI inside the room. Hopefully, when adding the rest, it will start to look better. Thanks for replying!! Link to comment Share on other sites More sharing options...
RyderSK Posted January 20, 2014 Share Posted January 20, 2014 Actually, I tried it from scratch as you mentioned without the light planes in the top and adjusted the camera exposure/vray sky/Vray Sun. It looked a little bit dark so I added an ambient light only affecting the GI inside the room. Hopefully, when adding the rest, it will start to look better. Thanks for replying!! Now, don't do that :- ) You need to learn to light correctly, in physically correct manner first, using right albedo materials (RGB tone value), correct exposure, color mapping and correct lights (Area, IES,etc..) Link to comment Share on other sites More sharing options...
Nic H Posted January 20, 2014 Share Posted January 20, 2014 yep no ambient light tricks! its only going to make it more complicated later on when you are wondering why it looks flat Link to comment Share on other sites More sharing options...
xiaome Posted January 22, 2014 Author Share Posted January 22, 2014 Now, don't do that :- ) You need to learn to light correctly, in physically correct manner first, using right albedo materials (RGB tone value), correct exposure, color mapping and correct lights (Area, IES,etc..) yep no ambient light tricks! its only going to make it more complicated later on when you are wondering why it looks flat Thanks for your replies! I took out the ambient light. Just sky/dome (for HDRI)/ and Vray plane with skyportal checked in the windows. I'm not using SolidRocks ... but the scene still is pretty foggy. Do you have any further suggestions? Thanks!! Link to comment Share on other sites More sharing options...
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