8/15/2023 0 Comments Make glass blender cycles![]() ![]() Lets add a room with a sun going through the glass into the room. Yes I know the glass is so thin that there wouldn’t generally be any caustics anyway which is what Blender is trying to do, so it does require different procedures but its still glass nevertheless and it shouldn’t be this complicated… Glass windows in Blender… This is quite frankly the best example of how bad the Blender glass material is. People might be meaning 2 different things here so I’ll mention both in this section ![]() How do you make blender architectural glass materials in cycles? This may be a lot easier than the node set up, but you are not able to add more or less shadow if you need it. Here we can select an object with a very basic glass shader and in the Object Properties panel, under Visibility, we can turn off the Ray visibility for Diffuse and Shadow. Is that the only method? Well actually no! Blender also has some additional settings which you can adjust for the entire selected object. That is more like it! This looks like realistic glass! (below) Okay, maybe the complete lack of shadows is not 100% what you want, so if we add a little MixRGB we can add more or less shadow to your liking. We do this simply by adding them together with a math node which connects to the factor of the mix shader If there is a shadow ray, or a diffuse ray, then make those rays transparent.Next we will use a light path node to tell it the following.The Principled BSDF shader goes into a mix shader along with a transparency node.Roughness set to 0, or 0.01 (nothing is truly purely glossy).That can easily be fixed with a little node set up and settings. Just look at the Blender version to compare, it has a darker base even in a brighter scene!Īs you can see above, Blender is trying(?) to use its physically accurate Principled BSDF shader along with the caustic settings to give you a realistic result. Sorry its a bit dark but colour of the base is exactly how it should be. Simply used the base shader, set the material to refract with full gloss and BOOM, exactly what we want. ![]() The difference is immediateĪs another comparison. In comparison, here is a photo of real glass (encase you’ve forgotten what glass looks like). Basically, without setting my computer on fire, this is the best that comes out. The problem with this though, is that it is very slow, and 9 times out of 10 you end up with a horrible dark shadow at the bottom of a glass which doesn’t look to me very much like refraction! The shadow is far too strong for any refraction object.Īs an example here is a glass in Blender and just look at that horrible dark grey base! This is using 64 max light bounces for all light path types, refractive and reflective caustics turned on, clamping turned off. This SHOULD technically create those shadow and lit areas as mentioned before… When you use the Blender principled bsdf shader settings to set up a glass material on an object, Blender automatically gives the object shadows which is correct like I mentioned above! You have to enable reflective and refractive caustics properties in the render settings so Blender can try to to pass light through it correctly. Essentially this is where refraction and caustics comes from (in very simple terms). This essentially creates shadows and light areas. With glass in real life light passes through it but not in a straight line. What’s wrong with glass shaders in blender? Blender eevee glass materials can be a little tricky sometimes We will cover Blender eevee glass shader in another blog. Note: this blog will only focus on Blender Cycles Render Glass. For Blender you need to give it a little nudge. Glass is one of my biggest bugbears in Blender so I’m going to make a blog to show you what you need to do, and what you need to look out for.įor other render engines, if you tell something is Glass material, it acts like a glass material. One of the key materials or shaders and used in nearly every render, and yet with Blender Cycles it unfortunately falls flat on its face.
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