![]() ![]() Note that a smaller step size will reduce the noise too so you'll need less samples to get a good result. Be sure to choose the largest step size for the level of detail you're looking for. 01, you'll get 10 times more details, but it will take 10 times longer to render. Try different step sizes : The step size parameter (Render -> Geometry -> Volume Sampling -> Step Size) has a huge impact on details and rendering time.Rendering fractals in a general raytracing engine require a massive amount of calculations, that's why I'll give you a few advices to optimize your rendering time. Haze : the volume that will be outside of the fractal.InsideVolume : the volume that will be inside of the fractal.HazeClosener : if you want to keep the haze close to the fractal, raise this value.Distance : the distance to the fractal (should be linked to the output of the juliabulb shader).DistanceDelta : it moves the bound of the fractal outside or inside, keep this value at 0 to get the most details.C : changes the shape of the fractal (connect it to a combineXYZ to tweak the values).Scale : the scale of the fractal, if the fractal goes out of the bounds of the object, just lower the scale.Bailout : the radius of the invisible sphere containing the fractal, just keep it to 10 or bigger. ![]() Iterations : more iterations give more details but makes the shader slower.Power : changes the shape of the fractal.Here's an example of a correctly set up material: You'll then need to connect a combineXYZ to the "C" input of the juliabulb shader if you want to change the values (the default ones are (.5. Then connect two volume shaders to the "Haze" and "InsideVolume" inputs of the material shader (you can put only one of the two if you want, the volume will be transparent if unconnected). Then edit the material of the cube, add two script nodes, choose the "external" type and select the juliabulb and materials shader. Change the engine to Cycles, put your CPU as your rendering device and tick the "Open Shading Language" box just under it. To make a fractal, open a new blender file and keep the default cube, the fractal will be inside of it. Custom OSL shaders to create fractals in Blender with Cycles Instructions: ![]()
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