Method for estimation of the quantity of light received at a point P of a virtual environment, said virtual environment comprising a plurality of first points (121 to 12i, 131 to 13i, 151 to 153) lit by a light source, characterized in that said method comprises the following steps for: - estimating, for each first point, a value representative of the average of distances separating each first point from a plurality of first points of its neighbouring area, - grouping said first points to form a plurality of groups according to said estimated values and information representative of the location and orientation of first points, an item of orientation information representative of the orientation of the group and an item of location information representative of the location of the group being associated with each group, - estimating, for each group, the quantity of incident light received, - estimating a surface grouping at least some of the points of the virtual environment visible from a viewpoint, said surface comprising said point P, - determining at least a first group (321, 351) contributing to the lighting of said point P by reflection of the incident light received from said light source according to at least one item of occlusion information associated with said surface, said at least a first group (321, 351) being determined from said plurality of groups, wherein said at least a first group (321, 351) is determined as contributing to the lighting of the point P if the line connecting said at least a first group (321, 351) and said point P does not have any intersection with said surface, - estimating the quantity of light received by said point P from the quantity of incident light received by said at least one first group (321, 351) according to the at least one item of reflectance information associated with said at least one first group. - estimating, for each first point, a value representative of the average of distances separating each first point from a plurality of first points of its neighbouring area, - grouping said first points to form a plurality of groups according to said estimated values and information representative of the location and orientation of first points, an item of orientation information representative of the orientation of the group and an item of location information representative of the location of the group being associated with each group, - estimating, for each group, the quantity of incident light received, - estimating a surface grouping at least some of the points of the virtual environment visible from a viewpoint, said surface comprising said point P, - determining at least a first group (321, 351) contributing to the lighting of said point P by reflection of the incident light received from said light source according to at least one item of occlusion information associated with said surface, said at least a first group (321, 351) being determined from said plurality of groups, wherein said at least a first group (321, 351) is determined as contributing to the lighting of the point P if the line connecting said at least a first group (321, 351) and said point P does not have any intersection with said surface, - estimating the quantity of light received by said point P from the quantity of incident light received by said at least one first group (321, 351) according to the at least one item of reflectance information associated with said at least one first group.