Help with alpha composite - AccuRender nXt2024-03-29T08:47:39Zhttps://accurender.ning.com/forum/topics/help-with-alpha-composite?commentId=6293855%3AComment%3A31818&feed=yes&xn_auth=noThanks Roy. I tried all the t…tag:accurender.ning.com,2011-06-04:6293855:Comment:314852011-06-04T14:56:57.056ZKevin Lockwoodhttps://accurender.ning.com/profile/KSL
Thanks Roy. I tried all the tips given above and was getting the same results. Thought it was just me :)
Thanks Roy. I tried all the tips given above and was getting the same results. Thought it was just me :) There's definitely something…tag:accurender.ning.com,2011-06-04:6293855:Comment:319192011-06-04T14:53:48.447ZRoy Hirshkowitzhttps://accurender.ning.com/profile/RoyHirshkowitz
There's definitely something wrong with the alpha channel objects in the more recent builds-- I'm looking into it.
There's definitely something wrong with the alpha channel objects in the more recent builds-- I'm looking into it. That one worked as is because…tag:accurender.ning.com,2011-06-03:6293855:Comment:314702011-06-03T16:26:05.473ZRoy Hirshkowitzhttps://accurender.ning.com/profile/RoyHirshkowitz
<p>That one worked as is because you're compositing with white.</p>
<p> </p>
<p>The visible background you use while rendering is not relevant-- other than it may effect the exposure of the image-- which can be reset using the Brightness setting. (Reflective backgrounds may be important-- depends on the image.) (Peter is probably right in that it's easier to adjust things if you see everything at the same time.)</p>
<p> </p>
<p>******</p>
<p> </p>
<p>When compositing you have complete…</p>
<p>That one worked as is because you're compositing with white.</p>
<p> </p>
<p>The visible background you use while rendering is not relevant-- other than it may effect the exposure of the image-- which can be reset using the Brightness setting. (Reflective backgrounds may be important-- depends on the image.) (Peter is probably right in that it's easier to adjust things if you see everything at the same time.)</p>
<p> </p>
<p>******</p>
<p> </p>
<p>When compositing you have complete control. You can save off as many mask channels as you want in the image editor and edit them independently. You decide what colors to combine using photoshop, not the rendering background. The renderer encodes how much occlusion there is into the alpha channel when creating those shadows-- it's just a guess though (there is no way to really do this)-- and you may need to adjust the shadow portion of the mask channel.</p>
<p> </p>
<p>If you want to include the nXtImage of the thing I can take a run at it.</p> I did try using a material si…tag:accurender.ning.com,2011-06-03:6293855:Comment:318182011-06-03T16:14:30.212ZKevin Lockwoodhttps://accurender.ning.com/profile/KSL
<p>I did try using a material similar to the photo I was matching, but not with the background, as Peter suggested. I'll give that a go. I also used a solid background, but should have gone darker as you suggested, not lighter.</p>
<p> </p>
<p>This is one I did when alpha compositing was first introduced. Worked great for me back then :)…<a href="http://storage.ning.com/topology/rest/1.0/file/get/55257454?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/55257454?profile=RESIZE_1024x1024" width="640"></img></a></p>
<p>I did try using a material similar to the photo I was matching, but not with the background, as Peter suggested. I'll give that a go. I also used a solid background, but should have gone darker as you suggested, not lighter.</p>
<p> </p>
<p>This is one I did when alpha compositing was first introduced. Worked great for me back then :)<a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/55257454?profile=original"><img class="align-full" width="640" src="http://storage.ning.com/topology/rest/1.0/file/get/55257454?profile=RESIZE_1024x1024"/></a></p> Edit the mask channel in Phot…tag:accurender.ning.com,2011-06-03:6293855:Comment:316232011-06-03T14:27:03.494ZRoy Hirshkowitzhttps://accurender.ning.com/profile/RoyHirshkowitz
Edit the mask channel in PhotoShop so you get more transparency-- simple brightness adjustments will probably work fine. When compositing make sure that the color your compositing with is darker (black, for a start).
Edit the mask channel in PhotoShop so you get more transparency-- simple brightness adjustments will probably work fine. When compositing make sure that the color your compositing with is darker (black, for a start). Sahara table. Brand-new stuff…tag:accurender.ning.com,2011-06-03:6293855:Comment:317072011-06-03T10:32:15.254ZGeorge Ioannidishttps://accurender.ning.com/profile/GeorgeIoannidis
<p>Sahara table. Brand-new stuff from <span class="font_title">Sven Christiansen Peter? :D</span></p>
<p> </p>
<p><span class="font_title">Nice paradigm with explanation. Thanks.<br/></span></p>
<p>Sahara table. Brand-new stuff from <span class="font_title">Sven Christiansen Peter? :D</span></p>
<p> </p>
<p><span class="font_title">Nice paradigm with explanation. Thanks.<br/></span></p> This is rendered with backgro…tag:accurender.ning.com,2011-06-03:6293855:Comment:312422011-06-03T09:46:01.908ZPeter Milnerhttps://accurender.ning.com/profile/PeterMilner
<p>This is rendered with background image and then composited in Photoshop.</p>
<p>Rendering with the background image gives you the opportunity to adjust the lighting and perspective of you render to match the surroundings.</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/55257347?profile=original"><img class="align-full" width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55257347?profile=RESIZE_1024x1024"/></a></p>
<p>This is rendered with background image and then composited in Photoshop.</p>
<p>Rendering with the background image gives you the opportunity to adjust the lighting and perspective of you render to match the surroundings.</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/55257347?profile=original"><img class="align-full" width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55257347?profile=RESIZE_1024x1024"/></a></p> This one is purely rendered w…tag:accurender.ning.com,2011-06-03:6293855:Comment:316102011-06-03T09:41:20.872ZPeter Milnerhttps://accurender.ning.com/profile/PeterMilner
<p>This one is purely rendered with a background image (no Photoshop involved).</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/55257386?profile=original"><img class="align-full" width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55257386?profile=RESIZE_1024x1024"/></a></p>
<p>This one is purely rendered with a background image (no Photoshop involved).</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/55257386?profile=original"><img class="align-full" width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55257386?profile=RESIZE_1024x1024"/></a></p> I think it's important that y…tag:accurender.ning.com,2011-06-03:6293855:Comment:316082011-06-03T09:26:07.690ZPeter Milnerhttps://accurender.ning.com/profile/PeterMilner
<p>I think it's important that you assign a material to the ground plane similar to the photo you're compositing with.</p>
<p>I did a quick crude test with no materials assigned and you can see that the shadow is definitely the wrong colour. However I do get the transparency, though probably too much.…</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/55257416?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/55257416?profile=RESIZE_1024x1024" width="721"></img></a></p>
<p>I think it's important that you assign a material to the ground plane similar to the photo you're compositing with.</p>
<p>I did a quick crude test with no materials assigned and you can see that the shadow is definitely the wrong colour. However I do get the transparency, though probably too much.</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/55257416?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/55257416?profile=RESIZE_1024x1024" width="721" class="align-full"/></a></p>