Single pass rendering for head mounted displays

A graphics processing system configured to render geometry of a 3D scene for display on a head mounted display, the graphics processing system comprising:

• tiling logic arranged to project geometry of the 3D scene into a 2D projection plane, wherein image regions are defined in the projection plane;
• and
• rendering logic arranged to map the geometry from the projection plane into an image space using transformations, wherein a respective transformation is defined for each image region, and render the geometry in the image space to determine image values of an image to be displayed on the head mounted display,
• wherein the transformations are configured for mapping the geometry into the image space so as to counteract distortion introduced by an optical arrangement of the head mounted display.

A non-transitory computer readable storage medium having stored thereon a computer readable dataset description of a graphics processing system that, when processed in an integrated circuit manufacturing system, causes the integrated circuit manufacturing system to manufacture an integrated circuit embodying the graphics processing system, including:

• tiling logic arranged to project geometry of the 3D scene into a 2D projection plane, wherein image regions are defined in the projection plane;
• and
• rendering logic arranged to map the geometry from the projection plane into an image space using transformations, wherein a respective transformation is defined for each image region, and render the geometry in the image space to determine image values of an image to be displayed on a head mounted display,
• wherein the transformations are configured for mapping the geometry into the image space so as to counteract distortion introduced by an optical arrangement of the head mounted display.