Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CanvoX: High-resolution VR Painting in Large Volumetric Canvas   With virtual reality, digital painting on 2D canvases is now being extended
to 3D spaces. Tilt Brush and Oculus Quill are widely accepted among artists as
tools that pave the way to a new form of art - 3D emmersive painting. Current
3D painting systems are only a start, emitting textured triangular geometries.
In this paper, we advance this new art of 3D painting to 3D volumetric painting
that enables an artist to draw a huge scene with full control of spatial color
fields. Inspired by the fact that 2D paintings often use vast space to paint
background and small but detailed space for foreground, we claim that
supporting a large canvas in varying detail is essential for 3D painting. In
order to help artists focus and audiences to navigate the large canvas space,
we provide small artist-defined areas, called rooms, that serve as beacons for
artist-suggested scales, spaces, locations for intended appreciation view of
the painting. Artists and audiences can easily transport themselves between
different rooms. Technically, our canvas is represented as an array of deep
octrees of depth 24 or higher, built on CPU for volume painting and on GPU for
volume rendering using accurate ray casting. In CPU side, we design an
efficient iterative algorithm to refine or coarsen octree, as a result of
volumetric painting strokes, at highly interactive rates, and update the
corresponding GPU textures. Then we use GPU-based ray casting algorithms to
render the volumetric painting result. We explore precision issues stemming
from ray-casting the octree of high depth, and provide a new analysis and
verification. From our experimental results as well as the positive feedback
from the participating artists, we strongly believe that our new 3D volume
painting system can open up a new possibility for VR-driven digital art medium
to professional artists as well as to novice users.

16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph