selos69 Posted November 23, 2007 Share Posted November 23, 2007 Hi guys, I know it has been touched on but i couldnt seem to find an answer that works. On the roof im using a corrugated displacement map and its coming up with triangulated/diamond patterns on the roof. I imported a CAD file and traced it with a spline which i then extruded a little. It happens only sometimes (on different jobs) which is confusing me. Any advice would be much appreciated. P.S. Please ignore the quality of the work (and the design..YUK!). It was done ver very quickly! Link to comment Share on other sites More sharing options...
dagor Posted November 23, 2007 Share Posted November 23, 2007 may be there are some double faces ar unwelded boundarys? check roof geometry. Link to comment Share on other sites More sharing options...
selos69 Posted November 23, 2007 Author Share Posted November 23, 2007 geometry seems fine? Link to comment Share on other sites More sharing options...
WAcky Posted November 23, 2007 Share Posted November 23, 2007 Nice render so far! I had the exact same problem. It appears that when mr does its displacement it has the sub-divide function going at this is what creates the diamond pattern. It only seems to do it on faces that dont have perpendicular sides. What i mean by this is it doesnt subdivide the surface in a perfect grid, it seems that when a polygon has an angled face, it therefor subdivides with angles. Anyway. The only fix i have found for this problem is to go up to 64k on the mr displacement settings, with and edge length of .1. You dont have to have displacement on with your final gather map so this can save time if you save it and read from it... Let us know how you go with it. Cheers, James Link to comment Share on other sites More sharing options...
selos69 Posted November 23, 2007 Author Share Posted November 23, 2007 hmm... I originally had the displacement map in the corrugated iron material displacement thinking it would be the same as the vray displacement modifier... apparently not! i removed the displacement off of the corrugated iron material and applied a displacement modifier to the object and it works fine. I didn't realise there was going to be that much of a difference between the two? Cheers for your help guys. Link to comment Share on other sites More sharing options...
WAcky Posted November 23, 2007 Share Posted November 23, 2007 hmm... I originally had the displacement map in the corrugated iron material displacement thinking it would be the same as the vray displacement modifier... apparently not! i removed the displacement off of the corrugated iron material and applied a displacement modifier to the object and it works fine. I didn't realise there was going to be that much of a difference between the two? Cheers for your help guys. I didnt even realise you were using Vray. Interesting that it happens for both Mr and Vray....huh. Link to comment Share on other sites More sharing options...
dagor Posted November 23, 2007 Share Posted November 23, 2007 can you share you room geometry with displace modifier and smal texture? Link to comment Share on other sites More sharing options...
selos69 Posted November 24, 2007 Author Share Posted November 24, 2007 Do you mean you want the displacement settings? Attatched is the updated fixed image and the displacement map. Link to comment Share on other sites More sharing options...
dagor Posted November 24, 2007 Share Posted November 24, 2007 i miss that you have fixed your problem )) Link to comment Share on other sites More sharing options...
WAcky Posted November 24, 2007 Share Posted November 24, 2007 Can i ask you what method you use for your sky? Looks nice Link to comment Share on other sites More sharing options...
selos69 Posted November 25, 2007 Author Share Posted November 25, 2007 Cheers dude. Vray sun, sky in environ slot & plane with sky bitmap attatched illuminated by omni, oh and physical cam Link to comment Share on other sites More sharing options...
WAcky Posted November 25, 2007 Share Posted November 25, 2007 interesting Ive been trying some diff methods but getting nowhere. Thanks for the tip Are you using onyx for foliage? Your bg trees look great! Im still having gripes with getting mine to look good. Dunno if its Vray > Mr or just bad technique Link to comment Share on other sites More sharing options...
selos69 Posted November 25, 2007 Author Share Posted November 25, 2007 Yeah onyx for foliage, just made a green material and applied it to leaves. Didn't bother with diffuse map. Try experimenting with vray, it really is easy (once you get the grasp of it) to create good results. For exterior scenes try this 'making of': http://www.vrayelite.com/station.php Also, experiment with LWF (Linear Work Flow). You should be able to come up with some really good results. Link to comment Share on other sites More sharing options...
WAcky Posted November 25, 2007 Share Posted November 25, 2007 Why thank you very much Link to comment Share on other sites More sharing options...
WAcky Posted November 27, 2007 Share Posted November 27, 2007 Just calibrated my monitor (Borrowed a friends Spyder2!) and updated to LWF like you suggested and your render looks simply stunning in this profile. Shame 99.99% of people aren't using this profile Thanks for this priceless piece of info you ROCK! Link to comment Share on other sites More sharing options...
dave013 Posted June 12, 2008 Share Posted June 12, 2008 I'm having this exact problem when using the VrayDisplacement Mod and can't seem to fix it. Would you mind posting your settings? Link to comment Share on other sites More sharing options...
selos69 Posted June 12, 2008 Author Share Posted June 12, 2008 Its just a vray displacement modifier with 2d mapping and amount of 35mm. Always use the modifier rather than the displacement setting on the material map. Link to comment Share on other sites More sharing options...
DT18 Posted October 25, 2008 Share Posted October 25, 2008 I'm having the same problem with this same texture, could you please show your settings for the Displace modifier, because I'm not getting the same results... You used Displace modifier or VrayDisplacementMod??? Thanks a lot! Daro Link to comment Share on other sites More sharing options...
selos69 Posted October 25, 2008 Author Share Posted October 25, 2008 Always use the VrayDisplacementModifier from the modifier menu, never the displacement on the material map. I've always had dramas with the material displacement. If it still doesnt work, let me know and I'll get a screen for you. Link to comment Share on other sites More sharing options...
DT18 Posted October 26, 2008 Share Posted October 26, 2008 Yes please. I'll be very glad if can post a picture. One solution a¡ I found, but I don't like it is setting the vray displacement and the a UVWMap, but I created this texture. I'm just starting the project but I don't like what I'm getting. Thanks a lot for your help! Link to comment Share on other sites More sharing options...
Brian Smith Posted October 26, 2008 Share Posted October 26, 2008 just my 2 cents, but I recommend never using displacement on standing seam roofs for 3 reasons: this type of roof is not high polygon and in this case would probably only require about 5k faces. having to create a displacement on this object is just not necessary and unnecessarily adds render time. since you don't see the result til rendering, you can't add accurately add important details such as ridge and valley caps without guessing where they go. you can't easily modify their structure without rendering first to test the changes you make. they tend to perpetuate antialiasing effects, which is what i suspect is at least causing/worsening your problem i don't recommend using displacement on any type of roof for all the same reasons except the first. Link to comment Share on other sites More sharing options...
DT18 Posted October 26, 2008 Share Posted October 26, 2008 and what's your recommendation??? thanks a lot! Link to comment Share on other sites More sharing options...
Brian Smith Posted October 27, 2008 Share Posted October 27, 2008 http://3dats.com/images/tutorials/Book2-sample.pdf Link to comment Share on other sites More sharing options...
DT18 Posted October 27, 2008 Share Posted October 27, 2008 Thanks I'm reading it and I'll try this way! Link to comment Share on other sites More sharing options...
WAcky Posted October 28, 2008 Share Posted October 28, 2008 Hi Dario, I've recently had to do 18 quick renders with corrugated roofing on each. I found the best way was to model the roof and get the basic form of it. Then split the mesh into two objects. One that will have the corrugations running one way and the other object with the corrugations running the other way. I then created a plane and did an array with about a 20mm spacing an attached them all together. I then used this along with a boolean function and sliced a whole bunch of lines along the roof. This is like subdiving the roof mesh but only in the direction needed. Then rotate the slicing object and do the other half of the roof. I then applied a displace modifier with a map similar to the one you posted earlier, then apply a mesh smooth with only one iteration. Its hard to explain but its by far the quickest to make and render and it doesnt require a really dense mesh. Link to comment Share on other sites More sharing options...
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