Problems with 1.6 features
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Hi,
I’m strugling with the new features of the vray 1.6 beta for sketchup.
1.When using a hdri with the dome-light my model is too dark but the background is fine or when I up the intensity the lighting is better but the background sky is washed out/ too bright. Do I need additional GI-sun ? Or do I change my camera ISO-value?
2.When using a hdri with the dome-light I dont get shadows on the hdri-groundplane. How do I do this?
3.With the proxy option I can finally use x-frog trees. But they come with opacity mapped leafs and I cant seem to get a proper reflectionlayer for them. How do I just get reflection on the leaf and not on the rest of the (transparant) leaf geometry? Can I put the alpha somewhere else fort his? Or do I need a specular map somewere?
Answers anyone?
Thanks in advance. -
@rvdkruk75 said:
Hi,
I’m strugling with the new features of the vray 1.6 beta for sketchup.
1.When using a hdri with the dome-light my model is too dark but the background is fine or when I up the intensity the lighting is better but the background sky is washed out/ too bright. Do I need additional GI-sun ? Or do I change my camera ISO-value?
One thing is worth checking is to make sure your hdri is truly HDR and can be used as a light source. Otherwise, just put an image in the environment background material and you can adjust the intensity separately. You would need to uncheck "visibility" for your dome light though.
@unknownuser said:
2.When using a hdri with the dome-light I dont get shadows on the hdri-groundplane. How do I do this?
You can put a shadow catcher matte object to generate the shadows. I think there was another discussion somewhere on exactly how to do this. May be a good idea to put a sticky tutorial on this item here on the forum.
@unknownuser said:
3.With the proxy option I can finally use x-frog trees. But they come with opacity mapped leafs and I cant seem to get a proper reflectionlayer for them. How do I just get reflection on the leaf and not on the rest of the (transparant) leaf geometry? Can I put the alpha somewhere else fort his? Or do I need a specular map somewere?
You'll want to put your alpha map in the perpendicular slot (the one that is white by default) of your fresnel reflections to mask out the reflections. Make sure you have texture filtering turned off, or you will be looking at looong render times. (both your alpha of your diffuse and the mask for the reflections.)
@unknownuser said:Answers anyone?
Thanks in advance. -
1.Where is the HDRI from you are using? You should be able to turn off GI and BG and get an accurately lit scene without blowouts. One tip is to adjust the gamma of the HDRI down a little.
2.I'm pretty certain there is a shadow catcher material.
3.Use a VRay Material and not a Standard material and your opacity map will apply to the entire material.
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@unknownuser said:
You can put a shadow catcher matte object to generate the shadows. I think there was another discussion somewhere on exactly how to do this. May be a good idea to put a sticky tutorial on this item here on the forum.
I can't find a shadow catching material for v-ray for SU. Do you have a link or something?
@unknownuser said:
Make sure you have texture filtering turned off, or you will be looking at looong render times. (both your alpha of your diffuse and the mask for the reflections.)
@unknownuser said:Which button controls the texture filtering? Is that the "filter" below "Reflection" under general in the reflection layer? Should this be set to 0?
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hi Raymond,
@rvdkruk75 said:
I can't find a shadow catching material for v-ray for SU. Do you have a link or something?
in fact i searched about this problem and found video demonstrate this
link for Video : http://www.youtube.com/watch?v=ZMpME8wlA-c
Important note : this method works only when i use Hdri in environment slots as he did, but it didn't work with me when i used dome light with Hdri, and i don't know the solution to use it with dome light. maybe someone can find a solution for that.
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